Damage from the fall armyworm occurs in midsummer.
Larvae chew large holes in whorl stage leaves. Later, large holes may be chewed into the stalks at the nodes.
Control at the whorl stage usually is not practical and should not be attempted unless 75 percent of plants are infested.
Control may be justified on silking stage corn if small larvae are detected before they have tunneled into the shanks and ears.
|
Insecticide |
Rate |
|
Alpha-cypermethrin (Fastac EC) |
3.2 to 3.8 fl. oz./acre |
|
Beta-cyfluthrin (Baythroid XL) |
0.022 lbs. a.i./acre (2.8 fl. oz.) |
|
Bifenthrin (numerous products) |
0.033 to 0.10 lb. a.i./acre (2.1 to 6.4 fl. oz.) |
|
Chlorantraniliprole (Prevathon) |
14.0 to 20.0 fl. oz./acre |
|
Chlorpyrifos (numerous products) |
Check label, but generally 1 to 2 pints/acre |
|
Chlorpyrifos plus zeta-cypermethrin (Stallion) |
9.25 to 11.75 fl. oz./acre |
|
Cyfluthrin (Tombstone) |
0.044 lb. a.i./acre (2.8 fl. oz.) |
|
Deltamethrin (Delta Gold) |
0.018 to 0.022 lb. a.i./acre (1.5 to 1.9 fl. oz.) |
|
Flubendiamide (Belt SC) |
2.0 to 3.0 fl. oz./acre |
|
Gamma-cyhalothrin (Proaxis) |
0.01 to 0.015 lb. a.i./acre (2.56 to 3.84 fl. oz.) |
|
Lambda-cyhalothrin (numerous products) |
0.02 to 0.03 lb. of a.i./acre |
|
Lambda-cyhalothrin plus chlorantraniliprole (Besiege) |
6.0 to 10.0 fl. oz./acre |
|
Methomyl (Lannate) |
0.45 lb. a.i./acre |
|
Spinosad (Tracer) |
1 to 3 fl. oz./acre |
|
Zeta-cypermethrin (Mustang MAXX, etc.) |
0.02 to 0.025 lb. a.i./acre (3.2 to 4.0 fl. oz.) |
|
Zeta-cypermethrin + Bifenthrin (Hero) |
4 to 10.3 fl. oz. of product/acre |