Flea Beetle (Kansas Wheat)

Scouting time

They are typically a problem along field margins, especially in western Kansas in early plantings. Forage sorghum or weedy borders often harbor summer populations that can migrate to wheat fields in fall. Injury is more severe when beetles are present as plants emerge.

Sampling method

Visually inspect rows along field boarders.


A population of three to five beetles per row foot can kill seedling plants. Since damage is often localized along a field border, spot treatment of affected rows may be sufficient to control populations.

Chemical control

Flea Beetle



Alpha-cypermethrin (Fastac EC)

 0.012 to 0.025 lb. a.i./acre (1.8 to 3.8 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)

 0.5 to 1.0 lb. a.i./acre

Chlorpyrifos plus gamma-cyhalothrin (Cobalt Advanced)

 11 to 25 fl. oz./acre

Chlorpyrifos plus zeta-cypermethrin (Stallion)

 5.0 to 11.75 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. a.i./acre

Zeta-cypermethrin (Mustang MAXX, etc.)

 0.011 to 0.025 lb. a.i./acre (1.76 to 4.0 fl. oz.)


Non-chemical controls

None listed.

Content authors


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