Dr. Tree Fruit and Don: Recent Episodes
Penn State Extension
This podcast focuses on providing timely commercial tree fruit production advice for beginning industry professionals and seasoned growers. Educators from Penn State Extension and faculty from Penn State University’s horticulture, entomology, and plant pathology departments drop in to give insights and observations about what is going on in the orchards.
Kari, Greg, Shan and Don share a fast, practical harvest update focusing on EverCrisp and Fuji maturing ahead of color and what that means for storage. We also cover late pest pressure, storage rot prevention, and label uncertainty.
Photo Credit: Lindsay Brown, Penn State
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Don, Kari, Shan and Greg highlight disease and insect pressure to watch out for during a critical period to harvest some important Pennsylvania varieties. Keep an eye out for Shan and the crew's harvest maturity assessments weekly on Tuesdays.
Photo Credit: Lindsay Brown, Penn State
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Don, Kari, Shan and Greg talk about important reminders for the upcoming harvest, including spray coverage throughout the end of the season.
Photo Credit: Lindsay Brown, Penn State
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari, Don, Shan and Greg go over the important things to note for the end of July. This includes insect pressure, the last bit of disease sprays before harvest, and testing for plant nutrition.
Photo Credit: K. Peter, PSU
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari, Don, Greg and Shan go over what's critical in this heat regarding pesticides, coverage, and tree nutrition.
Photo Credit: K. Peter, PSU
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari, Don, Greg and Shan discuss what to do in the current heat wave just before the FREC Field Day. Keep an eye out for fungicide resistance!
Fungicide Resistance Tables: https://extension.psu.edu/spraying-by-the-numbers-fungicide-resistance-management-tables-for-tree-fruit-diseases
Photo Credit: K. Peter, PSU
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Don, Kari and Greg discuss what to keep an eye out for with a hot June on the horizon.
PSU FREC Field Day: https://extension.psu.edu/penn-state-fruit-research-and-extension-center-field-day
Photo Credit: K. Peter, PSU
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari, Don, Greg, and Shan discuss the end of the Spring season and what to do when the weather doesn't seem to want to cooperate. Topics include the end of the thinning window, fungicide coverage, and insect life cycles.
FREC Field Day: https://extension.psu.edu/penn-state-fruit-research-and-extension-center-field-day
Photo Credit: K. Peter, PSU
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari, Don, Shan and Greg meet up to discuss the large (and timely) volume of work headed down the pipe.
FREC Field Day: https://extension.psu.edu/penn-state-fruit-research-and-extension-center-field-day
Photo Credit: K. Peter, PSU
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari, Don, Greg and Shan discuss the MANY items coming down the pipeline within the next few days.
FREC Field Day: https://extension.psu.edu/penn-state-fruit-research-and-extension-center-field-day
Photo Credit: K. Peter, PSU
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari, Greg, Shan and Don discuss the wild weather that we've experienced early this season and the importance of disease, insect and blossom management.
Photo Credit: E. Winzler
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari and Don and joined yet again by Shan and Greg to provide the full spectrum of updates for the early season.
PS Extension Spring Orchard Meetings: https://extension.psu.edu/spring-orchard-meetings
Hosts: Don Seifrit, Kari Peter
Speakers: Shan Kumar, Greg Krawczyk
Photo Credit: K. Peter, PSU Extension
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari and Don are joined by Shan and Greg. Shan gives a phenology update from around the state, as well as highlights areas where some blossom damage occurred. Kari mentions several upcoming infection periods, and Greg highlights things to keep an eye out for as the weather looks like it will finally warm up consistently.
NEWA Website: https://www.newa.cornell.edu/
Hosts: Don Seifrit, Kari Peter
Speakers: Shan Kumar, Greg Krawczyk
Photo Credit: D. Weber, PSU Extension
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari and Don are joined by Shan and Greg. Kari and Shan outline some cold weather concerns for the next 24 hours, and Greg highlights the importance of good weather data for insecticide application timing.
NEWA Website: https://www.newa.cornell.edu/
Hosts: Don Seifrit, Kari Peter
Speakers: Shan Kumar, Greg Krawczyk
Photo Credit: K. Peter, PSU
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari has a disease update, and then she and Don are joined by Sarah Zost from the State Horticultural Association of PA. SHAP is looking for a new Executive Secretary. Job posting will be listed below when available. Since Sarah is a local fruit grower, Kari and Don do a Grower Q&A.
Hosts: Don Seifrit, Kari Peter
Photo Credit: K. Peter, PSU
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari provides a lightning fast update for the upcoming infection period starting the week of March 31, 2025.
Hosts: Don Seifrit, Kari Peter
Photo Credit: K. Peter, PSU
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Don and Kari return for a pre-season update and discuss the plan for the upcoming season of the podcast. Regular podcasts will be returning shortly!
Hosts: Don Seifrit, Kari Peter
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Shan and Don introduce Dr. Lee Kalcsits from Washington State University. Dr. Kalcsits is project head for SPARC: Strengthening Pear and Apple Resilience to Climate. He outlines what that grant will focus on over the next several years. Additionally, Don and Kari talk early season orchard maintenance as a follow-up to last season.
If you'd like to help research, please take the survey for SPARC:
English - https://wsu.co1.qualtrics.com/jfe/form/SV_eyfLFPQZ3dHutUi
Spanish - https://wsu.co1.qualtrics.com/jfe/form/SV_8q21anBgzuBmlam
Hosts: Don Seifrit, Kari Peter
Speakers: Shan Kumar, Lee Kalcsits
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
This work is/was supported by the USDA National Institute of Food and Agriculture - Specialty Crop Research Initiative project "Preparing U.S. Pome Fruit Production for Extreme Temperatures in a Changing Climate" (2024-51181-43289; Accession #1032988)
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Don is joined by Kari and Shan in this week's episode. Kari highlights the importance of good orchard maintenance to help reduce disease pressure in the upcoming year, and Shan highlights some of the ways to manage Fall weeds.
Mancozeb Comments Article: https://extension.psu.edu/fruit-times-alert-epa-soliciting-mancozeb-comments
Cultivating Business Conference Sign-Up: https://extension.psu.edu/cultivating-business-conference
Host: Don Seifrit
Speakers: Kari Peter, Shan Kumar
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Don is joined by Kari and Shan after a long absence. Kari provides an EPA update and a reminder about end of season sprays. Shan gives a brief overview of the season so far.
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Don is joined by Kari, Greg and Shan this week to discuss pathology, entomology and horticulture updates. Kari highlights the importance of grower feedback for the current round of EPA public comments regarding ziram, thiram and ferbam. Greg mentions the potential for Japanese beetle damage. And Shan highlights the importance of taking leaf and soil samples at this time of the season.
Links to the ag testing lab and Kari's update about the EPA are below.
EPA Public Comment fact sheet: https://extension.psu.edu/environmental-protection-agency-mitigation-proposal-update-ziram-thiram-ferbam
Penn State Ag Analytical Services Lab: https://agsci.psu.edu/aasl
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Don is joined by Kari, Greg and Shan to talk pathology, entomology and horticulture. Kari gets riled up about half sprays and what that means for disease management.
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker), Greg Krawczyk (speaker), Shan Kumar (speaker)
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
Lead Image: Image Credit – D. Seifrit, Penn State
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Episode 11 – Final Thinning Window
Description: Don, Shan, Greg and Kari talk the spring updates after the Spring Orchard Meetings. Shan talks final thinning chances, and Greg and Kari highlight how NEWA helps ensure a good IPM program.
NEWA Website: https://www.newa.cornell.edu/
NEWA State Coordinators: https://www.newa.cornell.edu/partners
Episode Host/Speakers: Kari Peter (host), Shan Kumar (speaker), Greg Krawczyk (speaker)
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
Lead Image: Image Credit – D. Seifrit, Penn State
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Don returns with Kari, Greg and Shan. Shan highlights the importance of thinning timing over the next few days, and Kari and Greg provide pathology and entomology updates.
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker), Greg Krawczyk (speaker), Shan Kumar (speaker)
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
Lead Image: Image Credit – D. Seifrit, Penn State
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Kari hosts for another week with guests, Dr. Greg Krawczyk and Dr. Shan Kumar. Shan provides an update on thinning (very time sensitive!), and Kari and Greg provide lengthy run-downs of all the potential problems in their respective specialties.
Episode Host/Speakers: Kari Peter (host), Greg Krawczyk (speaker), Shan Kumar (speaker)
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari, Shan and Greg discuss the importance of the next few days with thinning, infection events, and insect management all coming in at once. Also, Spring Orchard Meetings are available for registration at the following link: https://extension.psu.edu/spring-orchard-meetings
Episode Host/Speakers: Kari Peter (host), Shan Kumar (speaker), Greg Krawczyk (speaker)
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
Lead Image: Image Credit – D. Seifrit, Penn State
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Kari hosts without Don and has Drs. Shan Kumar and Greg Krawczyk on. The three specialists highlight things that growers need to be thinking about as Spring rapidly progresses.
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Kari and Don fire off a quick fire blight infection update. Plus some information on apple scab and blossom blight dangers in the next few days.
Spring Orchard Meetings: https://extension.psu.edu/spring-orchard-meetings
Grafting Workshop: https://extension.psu.edu/top-working-apple-trees-a-grafting-workshop
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker)
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under a Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
Lead Image: Image Credit – D. Seifrit, Penn State
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Kari and Don are joined once again by Greg. They highlight the pitfalls of the upcoming week, with the increasingly warm (and wet!) weather.
- Spring Orchard Meetings: https://extension.psu.edu/spring-orchard-meetings
- Grafting Workshop: https://extension.psu.edu/top-working-apple-trees-a-grafting-workshop
- Pollinator Workshop: Call 717-334-6271 or email aes186@psu.edu to register
Flight Seasonalities of Main Fruit Pests During the Growing Season
Don Seifrit (host)
Kari Peter (speaker)
Greg Krawczyk (speaker)
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under an Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
Lead Image: Image Credit – D. Seifrit, Penn State
Image: Don Seifrit, Penn State
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Kari and Don are joined for the first time this year by Dr. Greg Krawczyk to give an update on chlorpyrifos and a Spring insect update. Kari makes a slight adjustment to her recommendations from the last episode.
Don Seifrit (host)
Kari Peter (speaker)
Greg Krawczyk (speaker)
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under an Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
Image: Kari Peter, Penn State
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Kari and Don talk about what to do when the weather doesn’t cooperate with your plans for spraying.
Orchard Critical Frost Temperatures
Don Seifrit (host), Kari Peter (speaker)
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under an Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
Lead Image: Photo courtesy kie-ker on Pixabay.com
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Kari and Don highlight some early-season sprays and discuss what the week's low temperatures might mean for orchards.
Article: Orchard Critical Frost Temperatures
Episode Host/Speakers:
Don Seifrit (host), Kari Peter (speaker)
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under an Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
Lead Image: Courtesy of Penn State Extension
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Kari and Don jump back into the podcast with the new Professor of Horticulture at Penn State, Dr. Shan Kumar! Shan outlines his past work and future research interests. Additionally, he provides a winter update for horticultural practices to keep in mind. Kari provides a mid-winter sanitation update. Winter Fruit Schools and the new Tree Fruit Production Guide are on sale now!
2024 Winter Tree Fruit Meetings
2024 Tree Fruit Production Guide
Episode Host/Speakers:
Don Seifrit (host)
Kari Peter (speaker)
Shanthanu Kumar (speaker)
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under an Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
Lead Image: Penn State Extension
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Kari and Don check back in with Dr. Macarena Farcuh at the University of Maryland. Dr. Farcuh has a very active post-harvest lab, and she describes several of the research projects she has worked on since she began at the university. Dr. Farcuh’s lab has a very active web presence, and you can connect with her work at the links below.
Fruit Pulse Newsletter sign-up
YouTube Channel
Instagram
Blog de Extension en Español Link
Episode Host/Speakers:
Don Seifrit, Kari Peter (hosts)
Dr. Macarena Farcuh, Assistant Professor, University of Maryland
https://agnr.umd.edu/about/directory/macarena-farcuh
Lead Image: J. Schupp, Penn State
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under an Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Kari, Greg, and Don talk about pre-harvest applications to control post-harvest rots and late-season insect pests.
Don Seifrit (host)
Kari Peter (speaker)
Greg Krawczyk (speaker)
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under an Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
Image credit: K. Peter, Penn State
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Weekly update information on trap counts for Codling Moth, Obliquebanded Leafroller, Oriental Fruit Moth, Redbanded Leafroller, Spotted Tentiform Leafminer, and Tufted Apple Bud Moth during the 2023 growing season.
Jim Schupp highlights the importance of leaf analysis for orchard nutrition, and Kari highlights mid-season disease pressures. Spraying by the Numbers (link below) is discussed in-depth during Kari’s update.
Spraying by the Numbers
Don Seifrit (host)
Kari Peter (speaker)
Greg Krawczyk (speaker)
Photo credit: K. Peter, Penn State
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under an Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
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Sign UpFlight Seasonalities of Main Fruit Pests During the Growing Season
Weekly update information on trap counts for Codling Moth, Obliquebanded Leafroller, Oriental Fruit Moth, Redbanded Leafroller, Spotted Tentiform Leafminer, and Tufted Apple Bud Moth during the 2023 growing season.
Kari, Greg, and Don highlight some mid-season issues to be aware of, and Kari clarifies “wetting hours” versus “wedding hours.”
Don Seifrit (host)
Kari Peter (speaker)
Greg Krawczyk (speaker)
Music Credit: “The Raven and the Swan” by Josh Woodward is licensed under an Attribution 3.0 United States License. Courtesy of FreeMusicArchive.org
Photo: K. Peter, Penn State
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Sign UpFlight Seasonalities of Main Fruit Pests During the Growing Season
Weekly update information on trap counts for Codling Moth, Obliquebanded Leafroller, Oriental Fruit Moth, Redbanded Leafroller, Spotted Tentiform Leafminer, and Tufted Apple Bud Moth during the 2023 growing season.
Kari, Greg, and Don discuss changes in insect and disease pressure due to the rapidly changing weather conditions. Additionally, Dr. Daniel Weber has a brief additional segment highlighting the multi-state Virtual Meetups.
Virtual meetups can be joined at: bit.ly/2023-virtual-meetup
Don Seifrit (host)
Kari Peter (speaker)
Greg Krawczyk (speaker)
Daniel Weber (speaker)
Lead Image: K. Peter, Penn State
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Sign UpFlight Seasonalities of Main Fruit Pests During the Growing Season
Weekly update information on trap counts for Codling Moth, Obliquebanded Leafroller, Oriental Fruit Moth, Redbanded Leafroller, Spotted Tentiform Leafminer, and Tufted Apple Bud Moth during the 2023 growing season.
Kari, Greg, and Don discuss unexpected difficulties in mid-June. High (low?) lights include brown marmorated stink bug, hail damage, and bitter rot.
Kari’s update start: 0:53
Greg’s update start: 16:48
Don Seifrit (host)
Kari Peter (speaker)
Greg Krawczyk (speaker)
Lead Image: Brown marmorated stink bug adults. Photo: G. Krawczyk, Penn State
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Sign UpFlight Seasonalities of Main Fruit Pests During the Growing Season
Weekly update information on trap counts for Codling Moth, Obliquebanded Leafroller, Oriental Fruit Moth, Redbanded Leafroller, Spotted Tentiform Leafminer, and Tufted Apple Bud Moth during the 2023 growing season.
Kari, Don, Greg, and Jim talk about strange early-season weather. Jim provides advice for late and emergency thinning procedures. Kari and Greg highlight the current concerns in their specialties.
Don Seifrit (host)
Kari Peter (speaker)
Greg Krawczyk (speaker)
Jim Schupp (speaker)
Lead Image: Edwin Winzeler, Penn State
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Sign UpFlight Seasonalities of Main Fruit Pests During the Growing Season
Weekly update information on trap counts for Codling Moth, Obliquebanded Leafroller, Oriental Fruit Moth, Redbanded Leafroller, Spotted Tentiform Leafminer, and Tufted Apple Bud Moth during the 2023 growing season.
Kari and Don record an in-person episode! Kari has a hefty pathology update, with special attention to fire blight. Scout your fields!
Episode speakers:
Don Seifrit
Kari Peter
Lead photo: K. Peter, Penn State
Special Notice:
Bilingual Pesticide Labeling Webinar
The EPA has announced a public webinar/forum to discuss upcoming changes regarding pesticide label availability and accessibility to non-English speaking farm workers on Thursday, June 15, 2023, from 5:00 p.m. to 7:00 p.m. The goal is to obtain input from the public on ways to make bilingual pesticide labeling accessible to farmworkers as required by the Pesticide Registration Improvement Act of 2022 (PRIA 5). This is a free event.
Make sure you sign up to get notified of future Extension events for tree fruit growers!
Sign UpFlight Seasonalities of Main Fruit Pests During the Growing Season
Weekly update information on trap counts for Codling Moth, Obliquebanded Leafroller, Oriental Fruit Moth, Redbanded Leafroller, Spotted Tentiform Leafminer, and Tufted Apple Bud Moth during the 2023 growing season.
Kari and Don talk about a slowed-down Spring with Greg and highlight previous updates from the specialists depending on the geographic region listeners are in. Greg discusses how to calculate growing degree days for (more) accurate predictions of insect activity. Scout your fields!
Don Seifrit (host)
Kari Peter (host)
Greg Krawczyk (speaker)
Image: G. Krawczyk, Penn State
Make sure you sign up to get notified of future Extension events for tree fruit growers!
Sign UpFlight Seasonalities of Main Fruit Pests During the Growing Season
Weekly update information on trap counts for Codling Moth, Obliquebanded Leafroller, Oriental Fruit Moth, Redbanded Leafroller, Spotted Tentiform Leafminer, and Tufted Apple Bud Moth during the 2023 growing season.
Kari and Don are joined again by Drs. Greg Krawczyk and Jim Schupp. Jim highlights more information about thinning as the weather (hopefully) improves, and Greg talks about what to expect in insect development. Kari discusses several of the diseases to keep an eye out for over the next week.
Don Seifrit (host)
Kari Peter (host)
Greg Krawczyk (speaker)
Jim Schupp (speaker)
Image: Don Seifrit, Penn State
The 2023 Orchard Twilight Meetings are here!
Register for the meeting near you!
Make sure you sign up to get notified of these meetings and future Extension events for tree fruit growers! Sign UpFlight Seasonalities of Main Fruit Pests During the Growing Season
Weekly update information on trap counts for Codling Moth, Obliquebanded Leafroller, Oriental Fruit Moth, Redbanded Leafroller, Spotted Tentiform Leafminer, and Tufted Apple Bud Moth during the 2023 growing season.
Kari and Don are joined again by Drs. Greg Krawczyk and Jim Schupp. Jim and Greg highlight how the cold weather affects their specialties, and Kari shifts gears into apple scab and Marsonnina blotch management.
Don Seifrit (host)
Kari Peter (host)
Greg Krawczyk (speaker)
Jim Schupp (speaker)
Photo: K. Peter, Penn State
The 2023 Orchard Twilight Meetings are here!
Make sure you sign up to get notified of these meetings and future Extension events for tree fruit growers!
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Kari and Don discuss fire blight and Marsonnina blight risk in orchards, give an update (and a correction) from Dr. Krawczyk, and highlight upcoming Penn State Extension programming.
Hosts:
Don Seifrit
Kari Peter
To register for the Spring Orchard Meeting near you, visit:
https://extension.psu.edu/spring-orchard-meetings
Photo: Greg Krawczyk, Penn State
The 2023 Orchard Twilight Meetings are here!
Locations are being added, so if you don't see the meeting you usually attend, check the website again later, or reach out to Don (dus970@psu.edu) or Kari (kap22@psu.edu).
Make sure you sign up to get notified of these meetings and future Extension events for tree fruit growers!
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Kari and Don discuss summer in April with a lookout for fire blight and other diseases.
Don Seifrit (host)
Kari Peter (host)
Lead Image: K. Imhoff
The 2023 Orchard Twilight Meetings are here!
Locations are being added, so if you don't see the meeting you usually attend, check the website again later, or reach out to Don (dus970@psu.edu) or Kari (kap22@psu.edu).
Make sure you sign up to get notified of these meetings and future Extension events for tree fruit growers!
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Kari and Don highlight some early-season concerns after a cold weekend that is leading into a hot week.
Hosts:
Don Seifrit
Kari Peter
Lead Image: D. Seifrit, Penn State
The 2023 Orchard Twilight Meetings are just around the corner!
Make sure you sign up to get notified of these meetings and future Extension events for tree fruit growers!
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The first Fruit Bite of the growing season! Kari and Don highlight some early-season disease management with an apple scab infection period on the horizon.
Speakers: Don Seifrit and Kari Peter
Photo Credit: Dr. K. Peter, Penn State
The 2023 Orchard Twilight Meetings are just around the corner!
Make sure you sign up to get notified of these meetings and future Extension events for tree fruit growers!
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Kari and Don speak with Dr. Holly Bartholomew from the USDA-ARS. Holly outlines her research on patulin, what mycotoxins are, and why management is important.
Don Seifrit (host), Kari Peter (speaker)
Holly Bartholomew (speaker)
Lead Image: Kari Peter, Penn State
The 2023 Orchard Twilight Meetings are just around the corner!
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Kari and Don are joined again by Dr. Jurick, USDA, and Dr. Dianiris Luciano-Rosario from the University Of Wisconsin. Dianiris highlights her work on bin sanitation from mold spores and the differences in sanitation between wooden and plastic bins.
Hosts: Don Seifrit and Kari Peter
Wayne Jurick (speaker),
Dianiris Luciano-Rosario (speaker)
Penicillium expansum: biology, omics, and management tools for a global postharvest pathogen causing blue mould of pome fruit
Lead Image: Kari Peter, Penn State
The 2023 Orchard Twilight Meetings are just around the corner!
Make sure you sign up to get notified of these meetings and future Extension events for tree fruit growers!
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Kari and Don are joined once again by Dr. Jurick as he discusses basic research and the research focus of his laboratory and provides insight into the next few episodes.
Episode Host/Speakers:
Don Seifrit (host)
Kari Peter (speaker)
Wayne Jurick (speaker)
Photo Credit: Kari Peter, Penn State
The 2023 Orchard Twilight Meetings are just around the corner!
Make sure you sign up to get notified of these meetings and future Extension events for tree fruit growers!
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In this first full-length episode of Season 4, Kari and Don welcome back Johanny Castro with information about his continued work over the past year. Additionally, Dr. Wayne Jurick from the USDA joins the conversation. Dr. Jurick and his lab will be special guests over the next few weeks as we dive deeper into the topic of post-harvest rots.
Don Seifrit (host)
Kari Peter (speaker)
Johanny Castro (speaker)
Wayne Jurick (speaker)
https://www.ars.usda.gov/people-locations/person/?person-id=44968
Lead Image: Kari Peter, Penn State
In the first episode of season 4, Kari and Don highlight canker management during winter pruning and highlight some potential upcoming episodes.
Don Seifrit (host)
Kari Peter (speaker)
Lead Image: Dr. Gary Moorman, Penn State (retired)
It's Winter Tree Fruit School Season for 2023!
Check out the locations and speakers for the meeting nearest you!
2023 Commercial Tree Fruit Schools
In this 9th Fruit Bite, Don and Kari discuss Fall/Winter weed control, some end-of-season disease management, and year-end weather station maintenance.
Don Seifrit (host)
Kari Peter (speaker)
Image courtesy of SeagullNady on Pixabay.com
In this 8th Fruit Bite, Kari and Don discuss pre-harvest treatments for insects, disease, and post-harvest rot coverage and control.
Don Seifrit (host)
Kari Peter (speaker)
Lead Image: J. Castro, Penn State
In this 7th Fruit Bite, Kari and Don highlight the timing for leaf analysis, aphid control, and early harvest stone fruit disease control.
If someone is interested in doing soil or leaf analysis, here is a link to the Penn State analytical services laboratory: https://agsci.psu.edu/aasl
Don Seifrit (host)
Kari Peter (speaker)
Lead Image: K. Peter, Penn State
Dr. Peter and Don interview Dr. Phillip Martin, a former Ph.D. student of Kari’s, who performed his work on bitter rot. Phillip tells us all about the fungal cause of the disease and management techniques.
Don Seifrit (host)
Kari Peter (host)
Dr. Phillip Martin (guest)
Lead Image: Dr. Kari Peter, Penn State University
In this Fruit Bite, Kari has a big disease update. She highlights bitter rot and bitter rot control. The bacterial spot of stone fruit gets the spotlight this week, too. Bacterial spot control is discussed.
Don Seifrit (host)
Kari Peter (speaker)
Lead Image: K. Peter, Penn State
Kari's latest article: 2022 Disease Update: Prevent Bitter Rot on Apple
In this 5th Fruit Bite, Kari highlights codling moths and pheromone trapping, fire blight infections and tool cleaning, and rosy apple aphid control. Keep an eye out for sooty blotch and flyspeck.
If anyone wants to register for the Fruit Research and Extension Center field day in Biglerville, please reach out to Dr. Peter by email, at kap22@psu.edu.
Don Seifrit (host)
Kari Peter (speaker)
Lead Image: K. Peter, Penn State
The fourth Fruit Bite episode talks about caution during chemical thinning in response to the weather, especially after looking at models in previous weeks, fire blight and apple scab, and plum curculio.
Don Seifrit (host)
Kari Peter (speaker)
Lead Image: Jim Schupp, Penn State
The third Fruit Bite episode talks about fire blight, caution during chemical thinning in response to the weather, plum curculio, and white peach scale.
Don Seifrit (host)
Kari Peter (speaker)
Lead Image: K. Peter, Penn State
The second Fruit Bite highlights early-season issues with an emphasis on some disease pressure and insect reproduction prevention.
Don Seifrit (host),
Kari Peter (speaker)
Lead Image: K. Peter, Penn State
Don and Kari debut “Fruit Bites,” a new, short form of the Dr. Tree Fruit and Don podcast to provide information more often in a condensed format. Fruit Bites will be released about once a week. Kari highlights updates from herself and the other specialists discussing apple scab, powdery mildew, brown rot, white peach scale, and more.
Speakers: Don Seifrit (host)
Kari Peter, Associate Research Professor, Tree Fruit Pathology
Hello Listeners! The meeting in North East, PA, is ON for May 12, 2022. Don had some confusion between northeast and “North East." ;)
In this 1-on-1 episode, Dr. Peter provides an update on fire blight, apple scab, and several other diseases. Don also highlights upcoming in-person Penn State Extension events.
Spring Orchard Meetings Registration
Don Seifrit (host),
Kari Peter (speaker)
Lead Image: Dr. Kari Peter, Penn State University
Dr. Crassweller talks about herbicides that were released after the editing of the new tree fruit production guide, and Greg highlights the chlorpyrifos ban and what that means for growers with some still in their pesticide shed.
Below are links discussed in this episode:
2022-2023 Tree Fruit Production Guide
Pennsylvania Dept. Of Agriculture Chemsweep
Penn State Extension Sprayer Calibration Form (PA Residents Only)
Don Seifrit (host)
Kari Peter (speaker)
Greg Krawczyk (speaker)
Rob Crassweller (speaker)
Kari and Don discuss post-harvest rot with Kari’s Ph.D. student Johanny Castro. Originally from Costa Rica, Johanny currently works with Kari to look at post-harvest rots and diseases in Pennsylvania’s packhouses.
Don Seifrit (host)
Kari Peter (host)
Johanny Castro (speaker)
Lead Image: J. Castro, Penn State
Kari, Greg, Rob, and Don discuss mole and vole control, insect control during late Fall/Winter (including an update on Lorsban (chlorpyrifos)), and some fungicidal techniques to improve the orchard before next season.
Greg also requests grower feedback about worm (codling moth/oriental fruit moth) problems in their orchards. The lead image photo is the strange Pink Lady that’s discussed in the middle of the episode.
Don Seifrit (host)
Kari Peter (speaker)
Rob Crassweller (speaker)
Greg Krawczyk (speaker)
Lead Image: G. Krawczyk, Penn State
Don, Kari, Greg, and Rob are together again to discuss seasonal weather, coloration at harvest, stinging insects in fields, and late-season fungicide applications. Rob highlights an upcoming Penn State Extension event on October 27, 2021, Variety Showcase Field Day, about cultivar selections and tasting.
Don Seifrit (host)
Kari Peter (host/speaker)
Rob Crassweller (speaker)
Greg Krawczyk (speaker)
Dr. Long He (speaker)
Don, Kari, Greg, and Rob confer about which cultivars are ripening around the state. Rob talks about paraquat application. Greg outlines some of the important end-of-season insect pests and management, and Kari discusses post-harvest rots and their management.
Don Seifrit (host)
Kari Peter (speaker)
Rob Crassweller (speaker)
Greg Krawczyk (speaker)
Dr. Long He (speaker)
Lead Image: K. Peter, Penn State
Don, Kari, Greg, and Rob are joined for the first time by Dr. Long He, Penn State agriculture engineer. Dr. He describes his work and background and talks about future projects. Kari, Greg, and Rob also discuss current season concerns.
Don Seifrit (host)
Kari Peter (speaker)
Rob Crassweller (speaker)
Greg Krawczyk (speaker)
Dr. Long He (speaker)
Lead Image: K. Peter, Penn State
Don, Kari, Greg, and Rob talk about what growers should be keeping an eye on during mid-season development, including the end of periodical cicadas for 2021. They also discuss how one should go about finding a weather station to install on-farm. Special consideration is given to having a station with compatibility to the NEWA system from Cornell University: http://newa.cornell.edu/
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker), Rob Crassweller (speaker), Greg Krawczyk (speaker)
Lead Image:
D. Seifrit, Penn State Extension
Don, Kari, and Greg are joined by Dr. Jim Schupp (Penn State Fruit Research and Extension Center) for the first time. Dr. Schupp is a pomology professor, and he highlights some of the most important considerations for spring thinning. Greg talks about the complex entomology issues facing PA this spring, and Kari discusses the fire blight concerns facing orchardists.
Episode Host/Speakers:
Don Seifrit (host)
Kari Peter (speaker)
Jim Schupp (speaker)
Greg Krawczyk (speaker)
Lead Image: G. Krawczyk, Penn State University
Kari talks early season disease pressure, with importance placed on fire blight. Greg highlights the insect challenges facing growers over the next month (before a bigger report in 2-3 weeks), and Rob discusses frost/cold damage to blossoms.
Don Seifrit (host), Kari Peter (speaker), Rob Crassweller (speaker), Greg Krawczyk (speaker)
Lead Image: R. Crassweller, Penn State University
Kari and Don discuss grafting (especially scion wood collection) with Rob.
Greg highlights early-season insect scouting, and everyone talks weather tracking for their respective fields.
NEWA Weather Tracking Resources: http://newa.cornell.edu/
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker), Rob Crassweller (speaker), Greg Krawczyk (speaker)
Lead Image: R. Crassweller, Penn State University
Kari and Don are joined by Dr. Hillary Peterson, a former student at the Penn State Fruit Research and Education Center in Biglerville. Hillary talks about her work on brown marmorated stink bug (BSMB) parasitoids, especially the samurai wasp (Trissolcus japonicus).
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker), Hillary Peterson (speaker)
Lead Image: E. Talamas, USDA-ARS
Drs. Kari Peter and Rob Crassweller outline some important information for good winter pruning practices with Don. In the episode, Kari outlines a method of triage pruning for Fire Blight during the growing season.
That method is outlined further here: https://extension.psu.edu/disease-update-dealing-with-fire-blight-infections.
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker), Rob Crassweller (speaker)
Photo Credit: Ed Weaver, Weaver’s Orchard
Dr. Kari Peter and Don Seifrit are once again joined by Dr. Rob Crassweller. They discuss winter injury, how cold hardiness develops, and what to be aware of when pruning. Also, Dr. Crassweller outlines what the virtual Mid-Atlantic Fruit and Vegetable Convention will look like in 2021.
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker), Rob Crassweller (speaker)
Image Credit: R. Crassweller, Penn State
Dr. Kari Peter and Don Seifrit are joined by all of the podcast guests from the first (growing-season) year of the Dr. Tree Fruit and Don Podcast. Drs. Rob Crassweller, Greg Krawczyk, and Macarena Farcuh add their thoughts on what the 2020 growing season was like, and what to expect for 2021. There is also some preliminary discussion of what to expect for the 2021 Mid-Atlantic Fruit and Vegetable Convention.
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker), Rob Crassweller (speaker), Greg Krawczyk (speaker), Macarena Farcuh (speaker)
Lead Image: Image Credit – Chris Walsh, UMD
Don and Kari introduce Dr. Macarena Farcuh (University of Maryland) to the listeners. Macarena discusses her research and outreach for UMD Extension. Follow Macarena @farcuhmacarena on Twitter or @FruitQualityLab on Facebook.
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker), Macarena Farcuh (speaker)
Lead Image: Image Credit – Macarena Farcuh, UMD
Kari, Don, Greg, and Rob discuss late-season orchard issues. Particular attention is paid to marssonina blotch and brown marmorated stink bug. Rob discusses factors affecting ripeness and which cultivars are likely ready to be harvested.
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker), Greg Krawczyk (speaker), Rob Crassweller (speaker)
Image Credit – C. Walsh, UMD
Kari and Don are joined again by Rob Crassweller. Kari discusses blossom blast issues, and Rob talks NEWA and the carbohydrate thinning model.
Kari and Don are joined for the first time by Dr. Greg Krawczyk, Extension Tree Fruit Entomologist from Penn State. Greg and Don discuss some of the more philosophical aspects of integrated pest management to introduce listeners to Dr. Krawczyk’s work.
Kari and Don return for episode 2. In this second episode, they discuss early season tree fruit production disease issues.
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker)
Image credit: T. Baugher
Dr. Kari Peter (aka Dr. Tree Fruit) and Don Seifrit start a tree fruit podcast!
In this first episode, they discuss early season tree fruit production disease issues.
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker)
Image credit; Kari Peter
Kari and Don are joined for the first time by Dr. Rob Crassweller, Extension Horticulturist from Penn State. Kari outlines full bloom disease issues, and Rob discusses frost and fruit set.
Episode Host/Speakers: Don Seifrit (host), Kari Peter (speaker), Rob Crassweller (speaker)
Image Credit – M. Schupp