Grasshoppers (Kansas Wheat)

Scouting time

There are many species of grasshoppers in Kansas, and not all are crop pests, although most have the potential to inflict damage if present in large numbers. Damage can occur in fall or spring. Typically, grasshoppers invade from field margins as fall-planted wheat emerges. Occasionally,
heads may be damaged before harvest.

Sampling method

Vegetation bordering wheat fields should be inspected 10 days before planting.


Counts of seven to 12 grasshoppers per square yard signal potential problems. Once wheat has been planted, three or more hoppers per square yard within the field can destroy seedling wheat.

Chemical control


Grasshopper Management Options

Field Sprays


Alpha-cypermethrin (Fastac EC)

 3.2 to 3.9 fl. oz./acre

Beta-cyfluthrin (Baythroid XL)

 0.014 to 0.019 lb. a.i./acre (1.8 to 2.4 fl. oz.)

Carbaryl (Sevin)

 1.0 to 1.5 lb. a.i./acre

Chlorantraniliprole (Prevathon)

 8.0 to 20.0 fl oz/acre.

Chlorpyrifos (Lorsban-4E)

 Check label, but generally 0.5 to 1 pint/acre

Chlorpyrifos plus gamma-cyhalothrin (Cobalt Advanced)

 6 to 13 fl. oz./acre

Chlorpyrifos plus zeta-cypermethrin (Stallion)

 5.0 to 11.75 fl. oz./acre

Dimethoate (Dimethoate 4 EC)

 3/4 pint/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. a.i./acre


 57 1.5 pints/acre

Zeta-cypermethrin (Mustang MAXX, etc.)

 0.02 to 0.025 lb. a.i./acre (3.2 to 4.0 fl. oz.)




Non-chemical controls

None listed.

Content authors


This content may not be suitable for states other than Kansas.