11 - 7 June 2023

Welcome to Scaffolds Podcast, a weekly roundup of the timely updates on insect and disease management as well as phenological developments across New York State for apple growers. This week we are joined by Monique Rivera, assistant professor of entomology at Cornell AgriTech; Kerik Cox, associate professor of plant pathology; and Anna Wallis, Fruit IPM Coordinator.

In this episode, Monique sits down with Kerik to talk about the big picture outlook on apple scab and fireblight, and where things are headed for the future of disease management. As always, Anna Wallis brings us her State of the State update on degree day accumulation and apple phenology. Recorded June 7 and released June 8, 2023.

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BASE 43F Phenology and DDs for NY NEWA Stations from 1/1-6/7*

• Geneva || fruit sizing || 888
• Highland HVRL || fruit sizing || 1141
• Clifton Park || fruit sizing || 977
• Peru (Forrence) || fruit sizing || 820
• Medina - Inland || fruit sizing || 825
• Appleton North - Lake || fruit sizing || 761
• Fairville (The Apple Shed) - Inland || fruit sizing || 827
• Williamson (DeMarree) - Lake || fruit sizing || 786

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BASE 43F Upcoming Pest Events: Average DDs (std)*

• Plum curculio - 1st oviposition scars: 555 (± 77)
• Pear psylla - hardshell stage: 569 (± 87)
• Lesser peach tree borer - 1st adult catch: 570 (± 94)
• San Jose scale - 1st flight peak: 644 (± 89)
• European red mite - sample (2.5 mite/leaf): June 1
• Obliquebanded Leafroller - set traps: June 1
• Black stem borer - 1st flight peak: 681 (± 170)

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BASE 50F DDs for NY NEWA Stations from 1/1-6/7*

• Geneva || 523
• Highland HVRL || 659
• Clifton Park || 575
• Peru (Forrence) || 479
• Medina - Inland || 474
• Appleton North - Lake || 422
• Fairville (The Apple Shed) - Inland || 481
• Williamson (DeMarree) - Lake || 436

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BASE 50F Upcoming Pest Events: Average DDs (std)*

• Plum curculio - 1st oviposition scars: 286 (± 37)
• Pear psylla - hardshell stage: 312 (± 51)
• Lesser peach tree borer - 1st adult catch: 308 (± 59)
• San Jose scale - 1st flight peak: 355 (± 58)
• European red mite - sample (2.5 mite/leaf): June 1
• Obliquebanded Leafroller - set traps: June 1
• Black stem borer - 1st flight peak: 383 (±122)

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DD50 from Petal Fall (accumulated and predicted)

[Location] || [PF Date**] || [June 6 DD] || June 12 DD predicted]

• Geneva || May 21 || 221 || 278
• Highland HVRL || May 9 || 357 || 420
• Clifton Park || May 16 || 276 || 333
• Peru (Forrence) || May 26 || 179 || 228
• Medina - Inland || May 26 || 174 || 233
• Appleton North - Lake || May 30 || 124 || 186
• Fairville (the Apple Shed) - Inland || May 23 || 180 || 236
• Williamson (DeMarree) - Lake || May 27 || 139 || 196

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*All DDs Baskerville-Emin, B.E.

** predicted in NEWA based on DD accumulations

LINKS

• Storm prediction center: https://www.spc.noaa.gov/
• Climate prediction center: https://www.cpc.ncep.noaa.gov/index.php
• Cox Lab blog: https://blogs.cornell.edu/coxlab/
• Cox Lab twitter: @fruitpathology
• Monique Rivera twitter: @moniquejrivera
• Anna Wallis twitter: @jesuisunanana