Episodes

  • 12 May 2026 - Timing Considerations for the Season, Scab & Fire Blight updates

    12 May 2026 - Timing Considerations for the Season, Scab & Fire Blight updates
    May 12 2026
    Petal Fall Meeting ScheduleWestern NY: Post-Bloom Insect & Disease Management, Freeze Events Info, and Thinning Recommendations WebinarWednesday, May 13, 4-5:30 PMhttps://cornell.zoom.us/j/93057550896?pwd=u2RBsT8jNARGMcOuW69fKRwyBObKPq.1&from=addonCapital Region: Saratoga/Mohawk Valley Petal Fall WebinarThursday, May 14, 4-5:30 PMhttps://cornell.zoom.us/j/98474224521?pwd=cla7pvnKFc32wypoaR0AMyVCwsDTR8.1Southern Hudson Valley: Ulster County In-Person Thinning MeetingFriday, May 15, 3-5pmWeed Orchards Farm Winery & Café 43 Mt. Zion Rd. Milton, New YorkNorthern Hudson Valley: Columbia County In-Person Thinning MeetingTuesday, May 19, 2-4pmCornell Cooperative Extension - Hudson Office CCE Regional Extension Center 479 NY-66 Hudson, New YorkHistorical Phenology and Average Degree Day Accumulation Base 43 (for reference)Pink (McIntosh) || 289 ± 26 || 3-May ± 7 daysFull bloom (McIntosh) || 378 ± 35 || 10-May ± 6 daysPetal fall (McIntosh) || 479 ± 42 || 18-May ± 6 daysPhenology & DDs for NY NEWA Stations from 1/1 – 5/11Station || Stage || DD 43F || DD 43 Forecast Through 5/17Geneva (AgriTech North) || Bloom || 510 || 587Highland (HVRL) || Petal Fall || 619 || 719Clifton Park || Bloom || 495 || 580Peru (Forrence) || Pink, King Bloom || 345 || 421Medina (Roberts) - Inland || Bloom || 470 || 541Appleton North - Lake || Bloom || 356 || 422Fairville (The Apple Shed) - Inland || Bloom || 498 || 569Williamson (DeMarree) - Lake || Bloom || 424 || 470*all DDs Baskerville-Emin, B.EUpcoming Pest EventsPest/Phenology Event || DD Base 43˚F || Approx. DateSTLM Traps set out || 1-AprPear psylla – egg laying || 84 ± 44 || 33 ± 21 || 4-Apr ± 11 daysRBLR – 1st catch || 144 ± 32 || 60 ± 20 || 17-Apr ± 9 daysRosy apple aphid – 1st nymphs present || 189 ± 55 || 86 ± 30 || 25-Apr ± 7 daysSTLM – 1st adult catch || 168 ± 48 || 73 ± 28 || 20-Apr ± 9 daysSTLM – 1st egg observed || 208 ± 65 || 94 ± 36 || 27-Apr ± 5 days---Tight cluster (McIntosh) || 228 ± 27 || 105 ± 19 || 27-Apr ± 7 daysTarnished plant bug – 1st observed || 222 ± 105 || 105 ± 62 || 25-Apr ± 15 daysOBLR – 1st overwintered larvae observed || 236 ± 78 || 112 ± 48 || 29-Apr ± 7 daysBlack stem borer – 1st adult catch || 283 ± 50 || 137 ± 40 || 6-May ± 3 daysEuropean red mite – egg hatch observed || 284 ± 53 || 134 ± 34 || 6-May ± 4 days---Pink (McIntosh) || 289 ± 26 || 139 ± 21 || 3-May ± 7 daysOFM Traps set out || PinkOriental fruit moth – 1st adult catch || 229* ± 44* || 126 ± 33 || 2-May ± 8 daysRBLR – 1st flight peak || 303 ± 75 || 150 ± 48 || 4-May ± 9 daysSTLM – 1st flight peak || 337 ± 71 || 168 ± 45 || 7-May ± 8 days---Full bloom (McIntosh) || 378 ± 35 || 192 ± 25 || 10-May ± 6 daysOBLR Overwintered Gen. Sample || BloomCodling Moth Traps set out || BloomPetal 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 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/Quick 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.html
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    40 mins
  • 5 May 2026 - Recent Weather Impacts on Pomes & Stones with Win Cowgill, Scab and Fire Blight Updates

    5 May 2026 - Recent Weather Impacts on Pomes & Stones with Win Cowgill, Scab and Fire Blight Updates
    May 5 2026
    Win Cowgill is an emeritus Rutgers Professor who currently owns his own consulting company called Win Enterprises where he consults on horticulture and pomology. And consults from New Jersey up to Maine. Kerik continues to talk about getting through extended/multiple apple scab infection periods, and the lack of fire blight risk in a cold bloom.This week on Scaffolds, I talk to Win Cowgill an emeritus Rutgers professor about what is going on in the north east region with all of the freezes and some options for what to do if you have damage in both apple and peach, Kerik gives us an update on scab and fire blight management strategy, and Anna closes the episode with the state of the state update on phenology, degree days, and trap captures around the state. LInk from Win CowgillMSU Critical Spring Temperatures for Tree Fruit Bud Development Stages https://www.canr.msu.edu/fruit/uploads/files/TreeFruitCriticalTemperatures.pdfHistorical 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 – 5/4Station || Stage || DD 43F || DD 43 Forecast Through 5/10 ||Geneva (AgriTech North) || Early Bloom || 460 || 476Highland (HVRL) || Petal Fall || 524 || 616Clifton Park || Bloom || 421 || 494Peru (Forrence) || Open Cluster || 284 || 346Medina (Roberts) - Inland || Early Bloom || 420 || 464Appleton North - Lake || Early Bloom || 310 || 346Fairville (The Apple Shed) - Inland || Early Bloom || 447 || 491Williamson (DeMarree) - Lake || Early Bloom || 375 || 404*all DDs Baskerville-Emin, B.EUpcoming Pest EventsPest/Phenology Event || DD Base 43˚F || Approx. Date---Tight cluster (McIntosh) || 228 ± 27 || 105 ± 19 || 27-Apr ± 7 daysTarnished plant bug – 1st observed || 222 ± 105 || 105 ± 62 || 25-Apr ± 15 daysOBLR – 1st overwintered larvae observed || 236 ± 78 || 112 ± 48 || 29-Apr ± 7 daysBlack stem borer – 1st adult catch || 283 ± 50 || 137 ± 40 || 6-May ± 3 daysEuropean red mite – egg hatch observed || 284 ± 53 || 134 ± 34 || 6-May ± 4 days---Pink (McIntosh) || 289 ± 26 || 139 ± 21 || 3-May ± 7 daysOFM Traps set out || PinkOriental fruit moth – 1st adult catch || 229* ± 44* || 126 ± 33 || 2-May ± 8 daysRBLR – 1st flight peak || 303 ± 75 || 150 ± 48 || 4-May ± 9 daysSTLM – 1st flight peak || 337 ± 71 || 168 ± 45 || 7-May ± 8 days---Full bloom (McIntosh) || 378 ± 35 || 192 ± 25 || 10-May ± 6 daysOBLR Overwintered Gen. Sample || BloomCodling Moth Traps set out || BloomCold Temperature and Frost RiskPicture Table of Critical Spring Temperatures for Tree Fruit Bud Development Stages https://www.canr.msu.edu/resources/picture-table-critical-spring-temperatures-for-tree-fruit-bud-development-stages Regional Weather Events page for NEWA weather stations, including a map of freeze events from 2024 and 2025. https://newa.cornell.edu/regional-weather-events/Cornell Statewide Frost Protection webinar held on Friday April 12th recording now available online here: https://youtu.be/TIBEpfb98wsScouting and Monitoring ResourcesNY 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=OtyOWCL1Q2A
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    47 mins
  • 28 April 2026 - Bees in Orchards with Shianne Lindsay, Scab and Fireblight Updates

    28 April 2026 - Bees in Orchards with Shianne Lindsay, Scab and Fireblight Updates
    Apr 28 2026
    This week on Scaffolds, I talk to Shianne Linsday, a graduate student in Dr Scott McArt’s lab, about our cool weather’s impact on pollinators, Kerik talks about getting through extended/multiple apple scab infection periods, and the lack of fire blight risk in a cold early bloom, and Anna gives us our state of the state update on trap captures and degree day accumulation around the state. State of the State show notesHistorical 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 – 4/27Station || Stage || DD 43F || DD 43 Forecast Through 5/3 ||Geneva (AgriTech North) || Pink || 404 || 436Highland (HVRL) || Full Bloom || 450 || 502Clifton Park || Pink || 351 || 397Peru (Forrence) || 1/2" Green || 220 || 267Medina (Roberts) - Inland || Early Pink || 368 || 398Appleton North - Lake || Early Pink || 255 || 279Fairville (The Apple Shed) - Inland || Early Pink || 386 || 415Williamson (DeMarree) - Lake || Early Pink || 322 || 342*all DDs Baskerville-Emin, B.E Upcoming Pest EventsPest/Phenology Event || DD Base 43˚F || Approx. DateSTLM Traps set out || 1-AprPear psylla – egg laying || 84 ± 44 || 33 ± 21 || 4-Apr ± 11 daysRBLR – 1st catch || 144 ± 32 || 60 ± 20 || 17-Apr ± 9 daysRosy apple aphid – 1st nymphs present || 189 ± 55 || 86 ± 30 || 25-Apr ± 7 daysSTLM – 1st adult catch || 168 ± 48 || 73 ± 28 || 20-Apr ± 9 daysSTLM – 1st egg observed || 208 ± 65 || 94 ± 36 || 27-Apr ± 5 days---Tight cluster (McIntosh) || 228 ± 27 || 105 ± 19 || 27-Apr ± 7 daysTarnished plant bug – 1st observed || 222 ± 105 || 105 ± 62 || 25-Apr ± 15 daysOBLR – 1st overwintered larvae observed || 236 ± 78 || 112 ± 48 || 29-Apr ± 7 daysBlack stem borer – 1st adult catch || 283 ± 50 || 137 ± 40 || 6-May ± 3 daysEuropean red mite – egg hatch observed || 284 ± 53 || 134 ± 34 || 6-May ± 4 days---Pink (McIntosh) || 289 ± 26 || 139 ± 21 || 3-May ± 7 daysOFM Traps set out || PinkOriental fruit moth – 1st adult catch || 229* ± 44* || 126 ± 33 || 2-May ± 8 daysRBLR – 1st flight peak || 303 ± 75 || 150 ± 48 || 4-May ± 9 daysSTLM – 1st flight peak || 337 ± 71 || 168 ± 45 || 7-May ± 8 days---Full bloom (McIntosh) || 378 ± 35 || 192 ± 25 || 10-May ± 6 daysOBLR Overwintered Gen. Sample || BloomCodling Moth Traps set out || Bloom Cold Temperature and Frost RiskPicture Table of Critical Spring Temperatures for Tree Fruit Bud Development Stages https://www.canr.msu.edu/resources/picture-table-critical-spring-temperatures-for-tree-fruit-bud-development-stages Regional Weather Events page for NEWA weather stations, including a map of freeze events from 2024 and 2025. https://newa.cornell.edu/regional-weather-events/Cornell Statewide Frost Protection webinar held on Friday April 12th recording now available online here: https://youtu.be/TIBEpfb98wsScouting 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.html
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    44 mins
  • 21 April 2026 - Talking Freeze Events with Dr. Jason Londo, Scab Updates and Fire Blight Beginnings

    21 April 2026 - Talking Freeze Events with Dr. Jason Londo, Scab Updates and Fire Blight Beginnings
    Apr 21 2026
    This week on scaffolds, I talk to Dr. Jason Londo about the freeze event we just had, Kerik talks scab risk and the first fire blight insight of the season, and anna gives us the state of the state update on degree day accumulations and phenology progress across the state. State of the State Show NotesHistorical 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 daysPhenology & DDs for NY NEWA Stations from 1/1 – 4/20Station || Stage || DD 43F || DD 43 Forecast Through 4/26 ||Geneva (AgriTech North) || Pink || 349 || 392Highland (HVRL) || King Bloom || 394 || 438Clifton Park || Pink || 299 || 334Peru (Forrence) || 1/2" Green || 175 || 199Medina (Roberts) - Inland || Tight Cluster || 313 || 352Appleton North - Lake || Tight Cluster || 220 || 241Fairville (The Apple Shed) - Inland || Tight Cluster || 330 || 364Williamson (DeMarree) - Lake || Tight Cluster || 281 || 295*all DDs Baskerville-Emin, B.EUpcoming Pest EventsPest/Phenology Event || DD Base 43˚F || Approx. DateSTLM Traps set out || 1-AprPear psylla – egg laying || 84 ± 44 || 33 ± 21 || 4-Apr ± 11 daysRBLR – 1st catch || 144 ± 32 || 60 ± 20 || 17-Apr ± 9 daysRosy apple aphid – 1st nymphs present || 189 ± 55 || 86 ± 30 || 25-Apr ± 7 daysSTLM – 1st adult catch || 168 ± 48 || 73 ± 28 || 20-Apr ± 9 daysSTLM – 1st egg observed || 208 ± 65 || 94 ± 36 || 27-Apr ± 5 days---Tight cluster (McIntosh) || 228 ± 27 || 105 ± 19 || 27-Apr ± 7 daysTarnished plant bug – 1st observed || 222 ± 105 || 105 ± 62 || 25-Apr ± 15 daysOBLR – 1st overwintered larvae observed || 236 ± 78 || 112 ± 48 || 29-Apr ± 7 daysBlack stem borer – 1st adult catch || 283 ± 50 || 137 ± 40 || 6-May ± 3 daysEuropean red mite – egg hatch observed || 284 ± 53 || 134 ± 34 || 6-May ± 4 days---Pink (McIntosh) || 289 ± 26 || 139 ± 21 || 3-May ± 7 daysOFM Traps set out || PinkOriental fruit moth – 1st adult catch || 229* ± 44* || 126 ± 33 || 2-May ± 8 daysRBLR – 1st flight peak || 303 ± 75 || 150 ± 48 || 4-May ± 9 daysSTLM – 1st flight peak || 337 ± 71 || 168 ± 45 || 7-May ± 8 days---Full bloom (McIntosh) || 378 ± 35 || 192 ± 25 || 10-May ± 6 daysOBLR Overwintered Gen. Sample || BloomCodling Moth Traps set out || BloomCold Temperature and Frost RiskPicture Table of Critical Spring Temperatures for Tree Fruit Bud Development Stages https://www.canr.msu.edu/resources/picture-table-critical-spring-temperatures-for-tree-fruit-bud-development-stages Regional Weather Events page for NEWA weather stations, including a map of freeze events from 2024 and 2025. https://newa.cornell.edu/regional-weather-events/Cornell Statewide Frost Protection webinar held on Friday April 12th recording now available online here: https://youtu.be/TIBEpfb98wsScouting 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.html
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    57 mins
  • 14 April 2026 - Reminders for Early Season, Higher Risk for Apple Scab

    14 April 2026 - Reminders for Early Season, Higher Risk for Apple Scab
    Apr 14 2026
    This week on Scaffolds, I give some reminders to think about as the season starts, Kerik talks scab predictions, and Anna gives us our weekly state of the state update on degree day accumulations around the state. Kerik: Apple Scab Disease forecast predictions for New York as of 4-12-26: There’s a lot of variability for Apple Scab risk across the regions. Eastern NY and the capital district have an easy week with few wetting periods and low levels of ejection. The lake champlain region may not all be at green tip. Western NY and the fingerlakes have accelerated apple scab maturity and prolonged wetting periods that span the week with high risk. In this region, the average temperatures during wetting periods are low 60s and could lead to many infections. State of the StateHistorical 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 – 4/13Station || Stage || DD 43F || DD 43 Forecast Through 4/19 ||Geneva || 1/2" green || 249 || 364Highland (HVRL) || tight cluster || 257 || 404Clifton Park || green tip || 178 || 301Peru (Forrence) || first green || 114 || 193Medina (Roberts) - Inland || 1/2" green || 214 || 306Appleton North - Lake || 1/2" green || 148 || 207Fairville (The Apple Shed) - Inland || 1/2" green || 235 || 334Williamson (DeMarree) - Lake || 1/2" green || 180 || 254*all DDs Baskerville-Emin, B.E Upcoming Pest EventsPest/Phenology Event || DD Base 43˚F || Approx. DateSTLM Traps set out || 1-AprPear psylla – egg laying || 84 ± 44 || 33 ± 21 || 4-Apr ± 11 daysRBLR – 1st catch || 144 ± 32 || 60 ± 20 || 17-Apr ± 9 daysRosy apple aphid – 1st nymphs present || 189 ± 55 || 86 ± 30 || 25-Apr ± 7 daysSTLM – 1st adult catch || 168 ± 48 || 73 ± 28 || 20-Apr ± 9 daysSTLM – 1st egg observed || 208 ± 65 || 94 ± 36 || 27-Apr ± 5 days---Tight cluster (McIntosh) || 228 ± 27 || 105 ± 19 || 27-Apr ± 7 daysTarnished plant bug – 1st observed || 222 ± 105 || 105 ± 62 || 25-Apr ± 15 daysOBLR – 1st overwintered larvae observed || 236 ± 78 || 112 ± 48 || 29-Apr ± 7 daysBlack stem borer – 1st adult catch || 283 ± 50 || 137 ± 40 || 6-May ± 3 daysEuropean red mite – egg hatch observed || 284 ± 53 || 134 ± 34 || 6-May ± 4 days---Pink (McIntosh) || 289 ± 26 || 139 ± 21 || 3-May ± 7 daysOFM Traps set out || PinkOriental fruit moth – 1st adult catch || 229* ± 44* || 126 ± 33 || 2-May ± 8 daysRBLR – 1st flight peak || 303 ± 75 || 150 ± 48 || 4-May ± 9 daysSTLM – 1st flight peak || 337 ± 71 || 168 ± 45 || 7-May ± 8 days---Full bloom (McIntosh) || 378 ± 35 || 192 ± 25 || 10-May ± 6 daysOBLR Overwintered Gen. Sample || BloomCodling Moth Traps set out || BloomCold Temperature and Frost RiskPicture Table of Critical Spring Temperatures for Tree Fruit Bud Development Stages https://www.canr.msu.edu/resources/picture-table-critical-spring-temperatures-for-tree-fruit-bud-development-stages Regional Weather Events page for NEWA weather stations, including a map of freeze events on 4/25 and 26. https://newa.cornell.edu/regional-weather-events/Cornell Statewide Frost Protection webinar held on Friday April 12th recording now available online here: https://youtu.be/TIBEpfb98wsScouting 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-Pests
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    32 mins
  • 7 April 2026 - Talking Woolly Apple Aphids with Dr. Robert Orpet, More Scab Predictions

    7 April 2026 - Talking Woolly Apple Aphids with Dr. Robert Orpet, More Scab Predictions
    Apr 7 2026
    This week on scaffolds, I talk to Dr. Robert Orpet of Oregon State University, one of the few people in the US who has worked extensively on woolly apple aphid but in Washington state, about woolly apple aphid, Kerik gives us more scab forecasting, and anna gives us the state of the state update with a review of scouting, degree day accumulations and reminders for the very quick start to the season happening in the Hudson Valley. Cox - Apple Scab Disease forecast predictions for New York as of 4-5-26 - Too cold for apple scab infections - refresh coverage as needed. State of the State Show NotesHistorical Phenology and Average Degree Day Accumulation Base 43 (for reference)- Silver Tip (McIntosh) || 58-106- Green Tip (McIntosh) || 99-144- Half Inch Green (McIntosh) || 150-201- Tight Cluster (McIntosh) || 206-257 Phenology & DDs for NY NEWA Stations from 1/1 – 4/6Station || Stage || DD 43F || DD 50F ||Geneva || green tip || 175 || 90Highland (HVRL) || 1/2" to early TC || 203 || 108Clifton Park || first green || 136 || 67Peru (Forrence) || silver tip || 84 || 34Medina (Roberts) - Inland || first green || 161 || 76Appleton North - Lake || first green || 118 || 55Fairville (The Apple Shed) - Inland || first green || 181 || 91Williamson (DeMarree) - Lake || first green || 147 || 72*all DDs Baskerville-Emin, B.E Upcoming Pest EventsPest/Phenology Event || DD Base 43˚F || Approx. DateSTLM Traps set out || 1-AprPear psylla – egg laying || 84 ± 44 || 33 ± 21 || 4-Apr ± 11 daysRBLR – 1st catch || 144 ± 32 || 60 ± 20 || 17-Apr ± 9 daysRosy apple aphid – 1st nymphs present || 189 ± 55 || 86 ± 30 || 25-Apr ± 7 daysSTLM – 1st adult catch || 168 ± 48 || 73 ± 28 || 20-Apr ± 9 daysSTLM – 1st egg observed || 208 ± 65 || 94 ± 36 || 27-Apr ± 5 days---Tight cluster (McIntosh) || 228 ± 27 || 105 ± 19 || 27-Apr ± 7 daysTarnished plant bug – 1st observed || 222 ± 105 || 105 ± 62 || 25-Apr ± 15 daysOBLR – 1st overwintered larvae observed || 236 ± 78 || 112 ± 48 || 29-Apr ± 7 daysBlack stem borer – 1st adult catch || 283 ± 50 || 137 ± 40 || 6-May ± 3 daysEuropean red mite – egg hatch observed || 284 ± 53 || 134 ± 34 || 6-May ± 4 days Cold Temperature and Frost RiskPicture Table of Critical Spring Temperatures for Tree Fruit Bud Development Stages https://www.canr.msu.edu/resources/picture-table-critical-spring-temperatures-for-tree-fruit-bud-development-stages Regional Weather Events page for NEWA weather stations, including a map of freeze events on 4/25 and 26. https://newa.cornell.edu/regional-weather-events/Cornell Statewide Frost Protection webinar held on Friday April 12th recording now available online here: https://youtu.be/TIBEpfb98wsScouting 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
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    42 mins
  • 31 March 2026 - Season 4 Begins! Winter meetings, Scab predictions, and Degree Day Accumulations

    31 March 2026 - Season 4 Begins! Winter meetings, Scab predictions, and Degree Day Accumulations
    Mar 31 2026

    State of the State

    Historical Phenology and Average Degree Day Accumulation Base 43

    Silver Tip (McIntosh) || 58-106

    Green Tip (McIntosh) || 99-144

    Half Inch Green (McIntosh) || 150-201

    Tight Cluster (McIntosh) || 206-257

    Phenology & DDs for NY NEWA Stations from 1/1 - 3/30

    Station || Stage || DD 43F ||

    Geneva (AgriTech North) || silver tip || 114 ||

    Highland (HVRL) || early green || 138 ||

    Clifton Park || silver tip || 93 ||

    Peru (Forrence) || dormant || 65 ||

    Medina - Inland || silver tip || 107 ||

    Appleton North - Lake || silver tip || 88 ||

    Fairville (The Apple Shed) - Inland || silver tip || 120 ||

    Williamson (DeMarree) - Lake || silver tip || 99 ||

    *all DDs Baskerville-Emin, B.E

    Upcoming Pest Events

    Pest/Phenology Event || DD Base 43˚F || Approx. Date

    STLM Traps set out || 1-Apr

    Pear psylla – egg laying || 84 ± 44 || 33 ± 21 || 4-Apr ± 11 days

    RBLR – 1st catch || 144 ± 32 || 60 ± 20 || 17-Apr ± 9 days

    Rosy apple aphid – 1st nymphs present || 189 ± 55 || 86 ± 30 || 25-Apr ± 7 days

    STLM – 1st adult catch || 168 ± 48 || 73 ± 28 || 20-Apr ± 9 days

    STLM – 1st egg observed || 208 ± 65 || 94 ± 36 || 27-Apr ± 5 days

    ---

    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

    —

    Scouting and Monitoring Resources

    Video: Apple Insect Targets and IPM Practices (including explanations of Degree Day calculations), https://youtu.be/NwyBAcvbpUs

    NY Tree Fruit Pest Monitoring Network Blog

    https://blogs.cornell.edu/treefruitpests/

    Interested in collaborating and contributing trap capture data? Contact Anna Wallis aew232@cornell.edu

    Quick Guide for Apple Insect Pests https://help.nysipm.org/hc/en-us/articles/23290226665751-NEWA-Quick-Guide-for-Apple-Insect-Pests

    Virtual Orchard Scout Training webinar recording on the Cornell IPM YouTube channel

    https://www.youtube.com/watch?v=OtyOWCL1Q2A

    Apple IPM Intensive Workshop playlist https://www.youtube.com/playlist?list=PLoNb8lODb49vifrm9Tla4GmAVhlIL0527

    Northeast Regional Climate Change Monthly Maps

    https://www.nrcc.cornell.edu/regional/monthly/monthly.html

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