Scouting time
Injury is likely to occur on two to four leaf stage corn when cold temperatures slow growth.
Thresholds
Treatments are seldom warranted if populations on two leaf corn remain below four
to five beetles per plant.
Chemical control
Insecticide |
Rate |
|
Alpha-cypermethrin (Fastac EC) |
2.7 to 3.8 fl. oz./acre |
|
Beta-cyfluthrin (Baythroid XL) |
|
|
Carbaryl (Sevin 4F) |
|
|
Chlorpyrifos (Lorsban 4E) |
|
|
Chlorpyrifos plus gamma-cyhalothrin (Cobalt) |
13 to 26 fl. oz. of product/acre |
|
Chlorpyrifos plus zeta-cypermethrin (Stallion) |
9.25 to 11.75 fl. oz./acre |
|
Cyfluthrin (Tombstone) |
0.013 to 0.025 lb. a.i./acre (0.8 to 1.6 fl. oz.) |
|
Deltamethrin (Decis 1.5EC) |
0.012 to 0.018 lb. a.i./acre (1.0 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.) |
|
Gamma-cyhalothrin (Proaxis) |
0.01 to 0.015 lb. a.i./acre (2.56 to 3.84 fl. oz.) |
|
Lambda-cyhalothrin (Warrior with Zeon Technology) |
0.02 to 0.03 lb. of a.i./acre (2.56–3.84 fl. oz./a) |
|
Lambda-cyhalothrin plus chlorantraniliprole (Besiege) |
6.0 to 10.0 fl. oz./acre |
|
Permethrin EC (Pounce 3.2EC) |
|
|
Zeta-cypermethrin (Mustang MAXX, etc.) |
0.017 to 0.025 lb. a.i./acre (2.72 to 4.0 fl. oz.) |
|
Zeta-cypermethrin + Bifenthrin (Hero) |
2.6 to 6.1 fl. oz. of product/acre |
Content authors
Disclaimers
This content may not be suitable for states other than Kansas.