Although larvae of this moth prefer corn, they sometimes infest sorghum heads. Infestations are more common in southern Kansas, and sorghum is vulnerable to infestation from bloom through milk stages.
Visual observation of earworms on plants.
One to two larvae per head can result in approximately 5 to 10 percent yield loss. The average size of larvae at detection is a key consideration, because less will be gained by treating older, larger larvae. The decision to treat should balance the expected yield and crop value against treatment cost and the amount of damage that can be prevented.
None listed.
This content may not be suitable for states other than Kansas.
|
Insecticide |
Rate |
|
Alpha-cypermethrin (Fastac EC) |
1.8 to 3.8 fl. oz./acre |
|
Beta-cyfluthrin (Baythroid XL) |
0.010 to 0.022 lbs. a.i./acre (1.3 to 2.8 fl. oz.) |
|
Chlorantraniliprole (Prevathon) |
14.0 to 20.0 fl. oz./acre |
|
Chlorpyrifos (numerous products) |
Check label, but generally 2 pints/acre. |
|
Chlorpyrifos plus gamma-cyhalothrin (Cobalt) |
19 to 38 fl. oz. of product/acre |
|
Chlorpyrifos plus zeta-cypermethrin (Stallion) |
5.0 to 11.75 fl. oz./acre |
|
Deltamethrin (Delta Gold) |
0.012 to 0.018 lb. a.i./acre (1 to 1.5 fl. oz.) |
|
Esfenvalerate (Asana XL 0.66) |
0.03 to 0.05 lb. a.i./acre (5.8 to 9.6 fl. oz.) |
|
Flubendiamide (Belt) |
2.0 to 4.0 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 |
|
Methomyl (Lannate) |
0.45 lb. a.i./acre |
|
Spinosad (Tracer) |
0.047 to 0.094 lb. a.i./acre (1.5 to 3 fl. oz.) |
|
Zeta-cypermethrin (Mustang MAXX, Respect EC, etc.) |
0.011 to 0.025 lb. a.i./acre (1.76 to 4.0 fl. oz.) |
|
|
|