Look for aphids in the whorl of plants in the vegetative growth stage. Populations usually decline rapidly after the head begins to emerge.
Visually inspect sorghum whorls.
Control is rarely necessary and should only be considered if infestations persist after heads have emerged.
Mild infestations of corn leaf aphid are generally considered to be beneficial because they attract and support populations of aphid natural enemies that later contribute to greenbug control.
This content may not be appropriate for states other than Kansas.
Insecticide |
Rate |
Alpha-cypermethrin (Fastac EC) |
0.02 to 0.025 lb. a.i./acre (3.2 to 3.9 fl. oz./acre) |
Chlorpyrifos (numerous products) |
Check label, but generally 0.5 to 1 pint/acre. |
Chlorpyrifos plus gamma-cyhalothrin (Cobalt) |
7 to 13 fl. oz. of product/acre |
Chlorpyrifos plus zeta-cypermethrin (Stallion) |
9.25 to 11.75 fl. oz./acre |