09 - 26 May 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 overviews some considerations for petal fall applications. Kerik brings us pt. 3 of his fireblight management recommendations, this time focused on nursery management. Anna gives the State of the State Update on regional developments in degree day accumulation, phenology, and pest captures from around the state. Recorded May 24 (Kerik and Monique) and May 26 (Anna), and released May 26, 2023.

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BASE 43F Phenology and DDs for NY NEWA Stations from 1/1-5/25*

• Geneva || 8-10 mm || 619
• Highland HVRL || 10-18 mm || 889
• Clifton Park || 10-12 mm || 713
• Peru (Forrence) || Petal Fall || 567
• Medina - Inland || Petal Fall / Fruit Sizing || 581
• Appleton North - Lake || Petal Fall / Fruit Sizing || 521
• Fairville (The Apple Shed) - Inland || Petal Fall / Fruit Sizing || 595
• Williamson (DeMarree) - Lake || Petal Fall / Fruit Sizing ||

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

• Lesser appleworm - 1st catch: 420 (± 144)
• Lesser appleworm - first peak flight: 569 (± 205)
• American plum borer - 1st adult catch: 457 (± 64)
• OFM - 1st flight peak (DD45): 369 (± 91)
• Codling moth - 1st adult catch: 475 (± 85)
• San Jose scale - 1st adult catch: 533 (± 88)
• Spotted tentiform leaf miner - 1st mines: 472 (± 129)
• 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 1/1-5/25*

• Geneva || 344
• Highland HVRL || 487
• Clifton Park || 392
• Peru (Forrence) || 307
• Medina - Inland || 307
• Appleton North - Lake || 262
• Fairville (The Apple Shed) - Inland || 326
• Williamson (DeMarree) - Lake || 293

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

• Lesser appleworm - 1st catch: 217 (± 88)
• Lesser appleworm - first peak flight: 313 (± 130)
• American plum borer - 1st adult catch: 240 (± 45)
• OFM - 1st flight peak (DD45): 223 (± 57)
• Codling moth - 1st adult catch: 249 (± 55)
• San Jose scale - 1st adult catch: 284 (± 61)
• Spotted tentiform leaf miner - 1st mines: 241 (± 76)
• 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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*All DDs Baskerville-Emin, B.E.

LINKS:

• Info on radiation freezes: https://www.canr.msu.edu/news/what_are_radiation_freezes
• Cox Lab blog: https://blogs.cornell.edu/coxlab/
• Cox Lab twitter: @fruitpathology
• Monique Rivera twitter: @moniquejrivera
• Anna Wallis twitter: @jesuisunanana