Twenty sites reporting this week. The second flight of European corn borer has started with nine sites reporting ECB-E and six sites reporting ECB-Z. Only three sites reporting corn earworm (CEW), but two of these were over threshold, indicating a need for a spray, please see the chart at the bottom of this page. Ten sites reporting Fall armyworm (FAW) catches with a high of 112 moths caught in Eden. Eleven sites reporting western bean cutworm (WBC) with Eden again having the highest count at 117.
WBC trap catches have increased over the last few weeks. According to data from the University of Nebraska, 50% of WBC emerge when the accumulated degree-days (base 50%) reach 1422 (see chart below). It is also recommended that scouting begins when cumulative trap catches reach 100 moths, however egg masses have been found when trap catches are in the single digits. The threshold for fresh market sweet corn is only 1%. It is important to scout late whorl and early tassel-emergence fields as these are most at risk. See last week’s post on how to scout sweet corn for WBC. After hatching larvae will spend a few days feeding on the tassel before moving down to the ear. Most insecticide sprays used to control ECB will also control WBC.
Location | ECB-E | ECB-Z | CEW | FAW | WBC | Total WBC to date |
DD to date |
Avoca (Steuben Co.) | 0 | 0 | 0 | 0 | 0 | 1 | 1318 |
Avon (Livingston Co.) | 1 | 0 | 0 | 18 | 10 | 16 | 1517 |
Baldwinsville (Onondaga Co.) | 3 | 0 | 0 | 0 | 9 | 20 | 1536 |
Batavia (Genesee Co.) | 5 | 0 | 0 | 1 | 16 | 18 | 1190 |
Bellona (Yates Co.) | 3 | 1 | 0 | 10 | 9 | 11 | 1578 |
Eden (Erie Co.) | 0 | 0 | 0 | 112 | 117 | 213 | 1414 |
Farmington (Ontario Co.) | 4 | 0 | 0 | 0 | 0 | 1 | 1444 |
Hamlin (Monroe Co.) | 2 | 2 | 0 | 0 | 0 | 0 | 1421 |
Kennedy (Chautauqua Co.) | 0 | 0 | 1 | 10 | 49 | 73 | 1209 |
King Ferry (Cayuga Co.) | NA | NA | NA | NA | NA | 1 | 1487 |
Kirkville (Madison Co.) | NA | NA | NA | NA | NA | 9 | 1601 |
LeRoy (Genesee Co.) | 1 | 7 | 2 | 0 | 0 | 0 | 1315 |
Lockport (Niagra Co.) | 2 | 1 | 0 | 0 | 0 | 0 | 1340 |
Oswego (Oswego Co.) | 0 | 0 | 0 | 0 | 23 | 28 | 1405 |
Owego (Tioga Co.) | 0 | 0 | 0 | 0 | 0 | 0 | 1352 |
Pavilion (Genesee Co.) | 0 | 0 | 0 | 44 | 27 | 58 | 1315 |
Penn Yan (Yates Co.) | 0 | 0 | 0 | 0 | 0 | 1 | 1535 |
Plessis (Jefferson Co.) | 0 | 0 | 0 | 1 | 62 | 77 | 1331 |
Preble (Cortland Co.) | 0 | 0 | 0 | 19 | 12 | 15 | 1478 |
Seneca Castle (Ontario Co.) | 6 | 1 | 0 | 0 | 5 | 7 | 1456 |
Sherwood (Cayuga Co.) | NA | NA | NA | NA | NA | NA | 1487 |
Spencerport (Monroe Co.) | 0 | 2 | 7 | 0 | 0 | 0 | 1517 |
Waterport (Orleans Co.) | NA | NA | NA | NA | NA | 0 | 1421 |
Williamson (Wayne Co.) | NA | NA | NA | NA | NA | 11 | 1355 |
ECB – European Corn Borer CEW – Corn Earworm FAW – Fall Armyworm WBC – Western Bean Cutworm NA – not available DD – Degree Day (modified base 50F) accumulation |
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trap catches for the week of 7.22.14 – 7.29.14 |