26 May 2026 - Petal Fall Pest Considerations, Scab and Fire Blight Updates

Phenology & DDs for NY NEWA Stations from 1/1 - 5/25Station || Stage || DD 43F || DD 43 Forecast 5/31 || Geneva (AgriTech North) || 10mm || 742 || 853Highland (HVRL) || 15mm || 893 || 1028Clifton Park || 10mm || 745 || 864Peru (Forrence) || PF || 554 || 679Medina (Roberts) - Inland || 8mm || 702 || 814Appleton North - Lake || 8mm || 560 || 674Fairville (The Apple Shed) - Inland || 8mm || 723 || 830Williamson (DeMarree) - Lake  || 8mm || 649 || 738*all DDs Baskerville-Emin, B.EUpcoming Pest Events (Reference: Table 7.1.4 Tree Fruit Guidelines)Full bloom (McIntosh) || 378 ± 35 || 192 ± 25 || 10-May ± 6 daysOBLR Overwintered Gen. Sample || BloomCodling Moth Traps set out || Bloom---Petal fall (McIntosh) || 479 ± 42 || 252 ± 32 || 18-May ± 6 daysLesser appleworm – 1st flight peak || 569 ± 205 || 313 ± 130 || 22-May ± 13 daysPlum curculio – 1st oviposition scars observed || 555 ± 77 || 286 ± 37 || 25-May ± 9 daysPear psylla – hardshell stage observed || 569 ± 87 || 312 ± 51 || 22-May ± 9 daysLesser peachtree borer – 1st adult catch || 570 ± 94 || 308 ± 59 || 24-May ± 8 daysSan Jose scale – 1st flight peak || 644 ± 89 || 355 ± 58 || 29-May ± 8 days---ERM Sample – 2.5 mites/leaf || 1-JunOBLR traps set out || 1-JunBlack stem borer – 1st flight peak || 681 ± 170 || 383 ± 122 || 1-Jun ± 9 daysRBLR – 1st flight ending || 753 ± 140 || 448 ± 105 || 2-Jun ± 8 daysAmerican plum borer – 1st flight peak || 784 ± 183 || 457 ± 128 || 3-Jun ± 9 daysCodling moth – 1st flight peak || 768 ± 206 || 442 ± 134 || 3-Jun ± 12 daysSTLM – 1st flight ending || 813 ± 128 || 475 ± 94 || 5-Jun ± 9 daysOBLR – 1st adult catch || 884 ± 90 || 523 ± 62 || 9-Jun ± 6 daysOFM – 1st flight ending || 825* ± 126* || 576 ± 97 || 12-Jun ± 8 daysPeachtree borer – 1st adult catch || 1032 ± 266 || 619 ± 182 || 15-Jun ± 11 daysSan Jose scale – 1st flight ending || 1039 ± 182 || 632 ± 125 || 16-Jun ± 8 daysBlack stem borer – 1st flight ending || 1056 ± 198 || 636 ± 154 || 19-Jun ± 9 daysSTLM – 2nd gen. 1st adult catch || 1063 ± 91 || 648 ± 74 || 16-Jun ± 6 daysSan Jose scale – 1st crawlers observed || 1124 ± 91 || 688 ± 69 || 19-Jun ± 8 daysDogwood borer – 1st adult catch || 964 ± 230 || 571 ± 151 || 12-Jun ± 9 daysScouting and Monitoring ResourcesVideo: Apple Insect Targets and IPM Practices (including explanations of Degree Day calculations),  https://youtu.be/NwyBAcvbpUs  NY Tree Fruit Pest Monitoring Network Bloghttps://blogs.cornell.edu/treefruitpests/Interested in collaborating and contributing trap capture data? Contact Anna Wallis aew232@cornell.eduQuick Guide for Apple Insect Pests https://help.nysipm.org/hc/en-us/articles/23290226665751-NEWA-Quick-Guide-for-Apple-Insect-PestsVirtual Orchard Scout Training webinar recording on the Cornell IPM YouTube channelhttps://www.youtube.com/watch?v=OtyOWCL1Q2AApple IPM Intensive Workshop playlist https://www.youtube.com/playlist?list=PLoNb8lODb49vifrm9Tla4GmAVhlIL0527Northeast Regional Climate Change Monthly Mapshttps://www.nrcc.cornell.edu/regional/monthly/monthly.htmlNEWA Help Desk Frequently Asked Questions and Table of Contents. https://help.nysipm.org/hc/en-us/categories/16994462926231-NEWA-Network-for-Environment-and-Weather-Applicationshttps://help.nysipm.org/hc/en-us/sections/17011505301783-Apple-Insect-Disease-and-Crop-Management-Forecasts