RESEARCH &
EDUCATION
CENTERS (REC)
IPM Reports
2020 Corn Earworm Moth Monitoring
A Scentry nylon mesh trap baited with Hercon Helicoverpa zea pheromone lures was placed at a farm in Hughesville, MD, and monitored weekly for corn earworm adults. The tables below report trap captures and indicate recommended control actions based on number of moths captured.
Pheromone trap captures for 2020 | ||
Date | Days | Corn Earworm Moths |
9-Jun | 8 | 5 |
15-Jun | 6 | 7 |
23-Jun | 8 | 3 |
1-Jul | 8 | 6 |
7-Jul | 6 | 17 |
14-Jul | 7 | 24 |
21-Jul | 7 | 13 |
28-Jul | 7 | 11 |
5-Aug | 8 | 16 |
11-Aug | 6 | 38 |
18-Aug | 7 | 27 |
25-Aug | 7 | 39 |
1-Sep | 7 | 88 |
9-Sep | 8 | 62 |
15-Sep | 6 | 26 |
22-Sep | 7 | 16 |
29-Sep | 7 | 1 |
Action thresholds and insecticide spray intervals during silking based on pheromone trap information of CEW moth activity, using the Scentry nylon mesh trap and Hercon Heliocoverpa zea lure (see Trap Monitoring for procedures). | |||
Average number of CEW moths captured per trap |
Recommended control action or days between sprays | ||
per day |
per 5 days |
per week | |
less than 0.2 |
less than 1 |
less than 1.4 |
spray at green silk then reassess |
0.2 - 0.5 |
1 - 2.5 |
1.4 - 3.5 |
6 |
0.5 - 1 |
2.5 - 5 |
3.5 - 7 |
5 |
1 - 13 |
5 - 65 |
7 - 91 |
4 |
>13 |
>65 |
>91 |
3 |
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