This week 11 of the 25 sites reported trap catch counts. Numbers for all moths remain very low. No FAW have been caught yet this season and WBC traps are being deployed this week. ECB-E was trapped at 4 of the 11 reporting sites while ECB-Z was trapped at only 2 sites and CEW at three sites. The previous week was cool and wet and might be one of the reasons that numbers remain so low.
This week we scouted a field of sweet corn that was started under row cover. The usual scouting and threshold recommendations do not apply for row cover, plastic, or transplanted sweet corn that is close to tassel emergence during the first generation flight of European corn borer (ECB). In these early plantings, larvae don’t feed in the whorl and emerge in the tassel as they do in bare ground corn. For this reason, tassel emergence scouting and thresholds have not been successful in plastic and row cover corn. 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.
The field we scouted this week had no ECB caught in the traps, though there was one ECB-E caught last week at this site. After scouting over 100 corn plants, no egg masses were found. This site is currently at 739 degree days modified base 50. Accumulated degree days ranges from 578 to 739 for the11 sites reporting trap catches this week. Peak moth flight should occur at approximately 631 degree days modified base 50.
| Location | ECB-E | ECB-Z | CEW | FAW | WBC |
| Avoca (Steuben Co.) | 0 | 0 | 1 | 0 | NA |
| Avon (Livingston Co.) | NA | NA | NA | NA | NA |
| Baldwinsville (Onondaga Co.) | 3 | 0 | 0 | 0 | NA |
| Batavia (Genesee Co.) | 0 | 0 | 3 | 0 | 0 |
| Bellona (Yates Co.) | NA | NA | NA | NA | NA |
| Eden Z (Erie Co.) | 0 | 0 | 0 | 0 | NA |
| Farmington (Ontario Co.) | 3 | 0 | 0 | 0 | NA |
| Hamlin (Monroe Co.) | NA | NA | NA | NA | NA |
| Interlaken (Seneca Co.) | 0 | 0 | 0 | 0 | 0 |
| Kennedy (Chautauqua Co.) | 0 | 0 | 0 | 0 | NA |
| King Ferry (Cayuga Co.) | NA | NA | NA | NA | NA |
| Kirkville (Madison Co.) | 6 | 0 | 0 | 0 | NA |
| LeRoy (Genesee Co.) | NA | NA | NA | NA | NA |
| Lockport (Niagra Co.) | 0 | 0 | 0 | 0 | NA |
| Olean (Cattaraugus Co.) | NA | NA | NA | NA | NA |
| Oswego (Oswego Co.) | NA | NA | NA | NA | NA |
| Owego (Tioga Co.) | 1 | 4 | 0 | 0 | NA |
| Penn Yan (Yates Co.) | 0 | 1 | 0 | 0 | NA |
| Pike (Wyoming Co.) | NA | NA | NA | NA | NA |
| Plessis (Jefferson Co.) | NA | NA | NA | NA | NA |
| Preble (Cortland Co.) | NA | NA | NA | NA | NA |
| Sherwood (Cayuga Co.) | NA | NA | NA | NA | NA |
| Spencerport (Monroe Co.) | NA | NA | NA | NA | NA |
| Waterport (Orleans Co.) | 0 | 0 | 1 | 0 | 0 |
| Williamson (Wayne Co.) | NA | NA | NA | NA | NA |
| ECB – European Corn Borer CEW – Corn Earworm FAW – Fall Armyworm WBC – Western Bean Cutworm NA – not available |
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| trap catches for the week of 6.4.13 – 6.11.13 |
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