06/23/15

WNY Sweet Corn Trap Network Report 6.23.15

Eighteen sites reporting this week with European corn borer (ECB)-E caught at 5 sites and ECB-Z caught at 9 sites. The first generation flight of ECB-E has peaked at all sites except Batavia, according to degree day calculations. The second generation of ECB- E will begin around 1400 degree days. Five sites are reporting 1 corn earworm (CEW) per trap, this number is below threshold and does not require a spray.  Fall armyworm was caught at 1 site and the first western bean cutworm (WBC) of the season was caught this week in Kennedy.

J.W. Apple, Department of Entomology, University of Wisconsin-Madison

J.W. Apple, Department of Entomology, University of Wisconsin-Madison

Location ECB-E ECB-Z CEW FAW WBC DD to Date
Avoca (Steuben Co.) 0 0 0 0 0  704.5
Avon (Livingston Co.) 0 0 NA 0 0  850.9
Baldwinsville (Onondaga Co.) 1 0 0 0 0  796.4
Batavia (Genesee Co.) 0 1 0 0 0  600.6
Belfast (Allegany Co.) NA NA NA NA NA  744.6
Bellona (Yates Co.) NA NA NA NA NA  874.2
Eden (Erie Co.) 3 14 1 0 0  749.0
Farmington (Ontario Co.) 0 0 0 0 0  758.4
Hamlin (Monroe Co.) 1 3 1 0 0  732.0
Kennedy (Chautauqua Co.) 0 0 0 0 1  668.5
King Ferry (Cayuga Co.) NA NA NA NA NA  823.0
Kirkville (Madison Co.) NA NA NA NA NA  851.0
LeRoy (Genesee Co.) 2 4 0 0 0  713.2
Lockport (Niagara Co.) 0 1 0 0 0  710.0
Oswego (Oswego Co.) 0 0 0 0 0  743.3
Owego (Tioga Co.) 6 6 0 0 0  733.3
Pavilion (Genesee Co.) NA NA NA NA NA  713.2
Penn Yan (Yates Co.) 0 0 0 0 0  836.6
Plessis (Jefferson Co.) NA NA NA NA NA  716.0
Preble (Cortland Co.) 0 0 1 2 0  797.0
Seneca Castle (Ontario Co.) 0 2 0 0 0  771.8
Sherwood (Cayuga Co.) NA NA NA NA NA  823.0
Spencerport (Monroe Co.) 0 6 1 0 0  850.9
Waterport (Orleans Co.) 0 2 1 0 0  732.0
Williamson (Wayne Co.) 0 0 0 0 0  694.3
ECB – European Corn Borer
CEW – Corn Earworm
FAW – Fall Armyworm
WBC – Western Bean Cutworm
NA – not available
DD – Degree Day (modified base 50F) accumulation
trap catches for the week of 6.16.15 – 6.23.15

Feeding damage caused by ECB has been observed in early tasseling corn, damage caused by fall army worm will look different to that of ECB. Please see the photos below to distinguish the two types of feeding damage. Scout whorl and emerging tassel stage corn for signs of armyworm and ECB feeding. The treatment threshold at the tassel emergence stage is 15% plants with damage or live larvae.

cewtable