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Sweet Corn Pheromone Trap Network

for Western NY - 2008

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.

For 9/30/08

This is the last report for the pheromone trap network.  Thanks to everyone who checked and hosted traps this summer!

Just a few locations reporting this week.  European corn borer catches were low at all locations.  Corn earworm numbers are still on a downward trend, but they are still being caught at nearly all trapping locations.  Fall armyworm catches remain low to moderate, except in Bellona where they took a big jump this week.

The chart below indicates recommended spray intervals during the silk stage for a range of trap catches:

Average CEW Pheromone 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
Add one day to the recommended spray interval if daily maximum temperatures are less than 80 F for the previous 2-3 days.

Location
ECB-E
ECB-Z
CEW
FAW
Batavia (Genesee Co.)
0
0
2
NA
Bellona (Yates Co.)
1
0
8
242
Hamlin (Monroe Co.)
0
0
6
14
LeRoy (Genesee Co.)
0
NA
1
NA
Penn Yan (Yates Co.)
0
1
0
12