29 April 2025

Dr. Bryan Danforth contact: [email protected] Historical Phenology and Average Degree Day Accumulation Base 43 (for reference) Tight cluster (McIntosh) || 228 ± 27 || 27-Apr ± 7 days Pink (McIntosh) || 289 ± 26 || 3-May ± 7 days Full bloom (McIntosh) || 378 ± 35 || 10-May ± 6 days Petal fall (McIntosh) || 479 ± 42 || 18-May ± 6 days ---------------------------------------------------------------- Phenology & DDs for NY NEWA Stations from 1/1 - 4/28 Station || Stage || DD 43F || DD 50F || Geneva (AgriTech North) || Pink to bloom || 315 || 155 Highland (HVRL) || Bloom || 416 || 215 Clifton Park || Pink || 304 || 154 Peru (Forrence) || Tight Cluster || 234 || 107 Medina - Inland || Pink || 283 || 141 Appleton North - Lake || Pink || 227 || 105 Fairville (The Apple Shed) - Inland || Pink || 299 || 148 Williamson (DeMarree) - Lake || Pink || 268 || 126 *all DDs Baskerville-Emin, B.E ----------------------------------------------------------------- Upcoming Pest Events Pest/Phenology Event || DD Base 43˚F || Approx. Date Tight cluster (McIntosh) || 228 ± 27 || 105 ± 19 || 27-Apr ± 7 days Tarnished plant bug – 1st observed || 222 ± 105 || 105 ± 62 || 25-Apr ± 15 days OBLR – 1st overwintered larvae observed || 236 ± 78 || 112 ± 48 || 29-Apr ± 7 days Black stem borer – 1st adult catch || 283 ± 50 || 137 ± 40 || 6-May ± 3 days European red mite – egg hatch observed || 284 ± 53 || 134 ± 34 || 6-May ± 4 days ---------------------------------------------------------------- Pink (McIntosh) || 289 ± 26 || 139 ± 21 || 3-May ± 7 days Oriental fruit moth – 1st adult catch || 229* ± 44* || 126 ± 33 || 2-May ± 8 days RBLR – 1st flight peak || 303 ± 75 || 150 ± 48 || 4-May ± 9 days STLM – 1st flight peak || 337 ± 71 || 168 ± 45 || 7-May ± 8 days ----------------------------------------------------------------- Full bloom (McIntosh) || 378 ± 35 || 192 ± 25 || 10-May ± 6 days OBLR Overwintered Gen. Sample Codling Moth Traps set out Lesser appleworm – 1st catch || 420 ± 144 || 217 ± 88 || 13-May ± 12 days American plum borer – 1st catch || 457 ± 64 || 240 ± 45 || 16-May ± 7 days OFM – 1st flight peak || 369* ± 91* || 223 ± 57 || 15-May ± 11 days Codling moth – 1st adult catch || 475 ± 85 || 249 ± 55 || 18-May ± 7 days San Jose scale – 1st adult catch || 533 ± 88 || 284 ± 61 || 21-May ± 8 days Cherry fruit fly traps set out || 20-May STLM – 1st sap-feeding mines observed || 472 ± 129 || 241 ± 76 || 18-May ± 13 days Petal fall (McIntosh) || 479 ± 42 || 252 ± 32 || 18-May ± 6 days *Base temperature for OFM 45F Weather NRCC State Maps Climate Prediction Center - Forecasts & Outlook Maps, Graphs and tables NEWA and Pest Forecasting NEWA Help Desk Frequently Asked Questions NEWA Help Desk Apple Insect, Disease, and Crop Management Forecasts Quick Guide for Apple Insect Pests Apple IPM Intensive Workshop playlist: Apple Insect Targets and IPM Practices NY Tree Fruit Pest Monitoring Network https://blogs.cornell.edu/treefruitpests/ Interested in collaborating and contributing trap capture data? Contact Anna Wallis [email protected] Virtual Orchard IPM Scout Training BF 224: Tree Fruit Scouting | Cornell Small Farms Program Cold Temperature and Frost Risk Picture Table of Critical Spring Temperatures for Tree Fruit Bud Development Stages Regional Weather Events page for NEWA weather stations Cornell Statewide Frost Protection webinar Pre-emergent Herbicides Spring Orchard Pre-Emergent Herbicides – CCE Eastern NY Commercial Horticulture Program