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Sweet Corn Pheromone Trap Network for Western New York

This is a seasonal scouting report giving growers in the Western New York area information on the presence of sweet corn pests and recommendations on scouting and thresholds. The report is written by Abby Seaman, NYS IPM's Area Extension Educator for Vegetables.

see previous issues below

Our most recent issue:

For 9/29/09

Just a few locations still reporting this week, the last week of the trap network report.  The only catches worth noting are again in Bellona, where corn earworm and fall armyworm catches remain inexplicably high.  Late sweet corn fields in that area are at risk for infestation of either larva in the silks.

Scouting and threshold information:

Once CEW are being caught in higher numbers, insecticide applications in silk stage fields should be determined by CEW trap catches.  The recommended spray intervals for CEW should be adequate for ECB and FAW control.  Because CEW lay their eggs directly on the silk, and eggs are difficult to find in the field unless the population is VERY high, we rely on pheromone trap catches rather than scouting to make CEW management decisions.  It is most important to adhere to the recommended spray intervals when the field is in the green silk stage.  The chart below indicates recommended spray intervals during the silk stage for a range of trap catches:

Per Day
Per Five Days
Per Week
Days Between Sprays
<0.2
<1.0
<1.4
No Spray (for CEW)
0.2-0.5
1.0-2.5
1.4-3.5
6 days
0.5-1.0
2.5-5.0
3.5-7.0
5 days
1-13
5-65
7-91
4 days
over 13
over 65
over 91
3 days

Location
ECB-E
ECB-Z
CEW
FAW
Batavia (Genesee Co.)
0
0
1
0
Bellona (Yates Co.)
NA
0
55
77
Farmington (Ontario Co.)
0
0
0
1
Kennedy (Chautauqua Co.)
0
0
1
5
Medina (Orleans Co.)
0
0
0
3
Owego (Tioga Co.)
0
0
0
0
Penn Yan (Yates Co.)
0
0
0
0
Williamson (Wayne Co.)
1
0
4
0
Previous Issues:
9-29-09
9-22-09
9-15-09
9-8-09
9-1-09
8-25-09
8-18-09
8-11-09
8-4-09
7-28-09
7-21-09
7-14-09
7-07-09
6-30-09
6-23-09
6-16-09
6-9-09
6-2-09
5-26-09
 
2008 Sweet Corn Pheromone Trap Network for Western New York
2007 Sweet Corn Pheromone Trap Network for Western New York
2006 Sweet Corn Pheromone Trap Network for Western New York
2005 Sweet Corn Pheromone Trap Network for Western New York
2004 Sweet Corn Pheromone Trap Network for Western New York
2003 Sweet Corn Pheromone Trap Network for Western New York
2002 Sweet Corn Pheromone Trap Network for Western New York
2001 Sweet Corn Pheromone Trap Network for Western New York
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These pages are maintained by the New York State IPM Program, part of Cornell Cooperative Extension. All material is protected by Section 107 of the 1976 copyright law. Copyright is held by Cornell University and the New York State IPM Program.