June 2, 2020

NY Sweet Corn Trap Network Report 6.2.20

An updated map of the current sites can be viewed at the About page of this blog. I have also divided the table below into Western and Eastern NY to reflect the map on the About page.

Thirteen sites reported this week with European corn borer (ECB)-E caught at 3 of the sites and ECB-Z caught at 2 sites. Two sites reported corn earworm (CEW) and both caught 2 CEW each, which puts those sites on a 6 day spray interval (see table at bottom of post). No fall armyworm (FAW) were caught at any of the reporting sites. Traps for western bean cutworm (WBC) went out this week, so the first reports will begin next week.

Next to 6 sites there is an asterisk. These sites have, in addition to the 5 regular traps, a new trap for the hybrid ECB. This moth is known to be present in North America and was caught at several sites in Canada last year. We have added the trap to these sites to see if the hybrid is present in NY. Over the last year I have received several reports of damage in the field but without significant trap catch. The ECB hybrid responds to a different pheromone lure and if present would not be attracted to either the ECB-E or ECB-Z lure. If any hyrbid ECB moths are caught I will post those numbers here as well.

Next to each site I have also included the accumulated degree days (base 86/50). Most sites are in the first spring moth or early egg laying stage for ECB (see table below).

ECB in early sweet corn, which was started under row cover, plastic or transplanted, does not feed in the whorl and emerge in the tassel as they do in bare ground corn and therefore the usual scouting and threshold recommendations do not apply. Target newly hatching larvae using the moth trap catches or scout for egg masses to determine when sprays are needed. Growers have had good results when pheromone trap catches were used to time sprays for the first generation ECB in row cover or plastic corn. Growers waited until there was a significant increase in the ECB trap catches in their area and then timed sprays to coincide with egg hatch. ECB eggs require 100 degree days (base 50) from oviposition to hatch. Two to three applications bracketing the peak moth flight are generally effective.

Location ECB-E ECB-Z CEW FAW WBC   DD 
Western NY trap Catch
Attica (Wyoming Co.) NA NA NA NA NA 402
Baldwinsville (Onondaga Co.) NA NA NA NA NA 448
Batavia (Genesee Co.) NA NA NA NA NA 412
Bellona (Yates Co.)* NA NA NA NA NA 417
Brockport (Monroe Co.) 0 0 0 0 NA 439
Eden (Erie Co.) 0 0 2 0 NA 450
Farmington (Ontario Co)* 0 0 0 0 NA 434
Geneva (Ontario Co.)* NA NA NA NA NA 417
Hamlin (Orleans Co.) NA NA NA NA NA 408
Kennedy (Chautauqua Co.) NA NA NA NA NA 422
King Ferry (Cayuga Co.) NA NA NA NA NA 390
Kirkville (Madison Co.) NA NA NA NA NA 444
LeRoy (Genesee Co.) NA NA NA NA NA 404
Lyndonville (Orleans Co.) 0 0 2 0 NA 386
Oswego (Oswego Co.) 0 0 0 0 NA 347
Panama (Chautauqua Co.) NA NA NA NA NA 372
Penn Yan (Yates Co.)* 0 1 0 0 NA 400
Portville (Cattaraugus Co.) NA NA NA NA NA 395
Preble (Cortland Co.) NA NA NA NA NA 294
Ransomville (Niagara Co.) 0 0 0 0 NA 418
Seneca Castle (Ontario Co.)* 6 0 0 0 NA 391
Sherwood (Cayuga Co.) NA NA NA NA NA 386
Williamson (Wayne Co.) NA NA NA NA NA 386
Eastern NY trap Catch
Accord (Ulster Co.) NA NA NA NA NA 543
Amsterdam (Fulton Co.) NA NA NA NA NA 414
Feura Bush (Albany Co.) NA NA NA NA NA 506
Florida (Orange Co.) NA NA NA NA NA 548
Greenwich (Washington Co.) NA NA NA NA NA 459
Hurley (Ulster Co.)* 21 4 0 0 NA 499
Kinderhook (Columbia Co.) NA NA NA NA NA 511
Melrose (Rensselear Co.) NA NA NA NA NA 507
Middleburgh (Schoharie Co.) NA NA NA NA NA 523
Peru (Clinton Co.) 0 0 0 0 NA 383
Plattsburgh (Clinton Co.) 0 0 0 0 NA 414
Plessis (Jefferson Co.) NA NA NA NA NA 412
South Colton (St. Lawrence Co.) NA NA NA NA NA 318
Stone Ridge (Ulster Co.) 2 0 0 NA NA 488
Ticonderoga (Essex Co.) 0 0 0 0 NA 402
Tivoli (Dutchess Co.) NA NA NA NA NA 551
Unadilla (Delaware Co.) NA NA NA NA NA 376
ECB – European Corn Borer
CEW – Corn Earworm
FAW – Fall Armyworm
WBC – Western Bean Cutworm
NA – not available
DD – Degree Day (base 86/50) accumulation Climate Smart Farming
trap catches for the week of 5.26.20 – 6.2.20