Bean Leaf Beetle (Kansas Soybean)

Sampling method

Visually inspect the canopy for beetles.

Thresholds

Severe cotyledon feeding, threatened destruction of the growing point, or populations of seven beetles per row-foot on soybeans with four or fewer nodes and
25 percent defoliation, may justify limited area treatments. In most years, 50 or more beetles per row-foot are required to reduce yields in late season. Treatments may be justified if significant pod-feeding occurs while pods are still developing.

Chemical control

Insecticide

Rate

Acephate (Acephate, Bracket, or Orthene)

(See supplemental labels for formulations and rates.)

Acetamiprid plus bifenthrin (Justice)

0.0351 to 0.0422 lbs. a.i./acre (2.5 to 3.0 fl. oz./acre)

Alpha-cypermethrin (Fastac EC)

2.8 to 3.8 fl. oz./acre

Beta-cyfluthrin (Baythroid XL)

0.0125 to 0.022 lbs. a.i./acre (1.6 to 2.8 fl. oz.)

Bifenthrin plus imidacloprid (Tempest)

0.06 to 0.095 lbs. a.i./acre (3.8 to 6.1 fl. oz./acre)

Carbaryl (Sevin)

0.5 to 1 lb. a.i./acre

Chloropyrifos (numerous products)

Check label, but generally 1 to 2 pints/acre

Chloropyrifos plus gamma-cyhalothrin (Cobalt)

19 to 38 fl. oz. of product/acre

Chloropyrifos plus zeta-cypermethrin (Stallion)

5.0 to 11.75 fl. oz./acre

Cyfluthrin (Tombstone)

Growth stage VC-V2: 0.8. After V2: 1.6 to 2.8 fl. oz./acre, see label

Deltamethrin (Delta Gold)

0.018 to 0.022 lbs. a.i./acre (1.5 to 1.9 fl. oz.)

Dimethoate (Check labels, bean leaf beetles are not listed on all labels.)

0.5 lb. a.i./acre

Esfenvalerate (Asana XL 0.66)

0.03 to 0.05 lb. a.i./acre (5.8 to 9.6 fl. oz.)

Gamma-cyhalothrin (Proaxis)

0.0075 to 0.0125 lb. a.i./acre (1.92 to 3.20 fl. oz.)

Imidacloprid (Alias 4F, Sherpa)

Check labels

Imidacloprid plus cyfluthrin (Leverage)

2.8 fl. oz./acre

Lambda-cyhalothrin (numerous products)

0.015 to 0.025 lb. a.i./acre

Lambda-cyhalothrin chlorantraniliprole (Besiege)

5.0 to 10.0 fl. oz./acre

Lambda-cyhalothrin plus thiamethoxam (Endigo ZC)

4.0 to 4.5 fl. oz./acre

Permethrin (Larvin EC)

0.45 to 0.75 lb. a.i./acre

Zeta-cypermethrin (Mustang MAXX, etc.)

0.0175 to 0.025 lb. a.i./acre (2.8 to 4.0 fl. oz.)

Zeta-cypermethrin plus bifenthrin (Hero)

2.6 to 6.1 fl. oz. of product/acre

 

Non-chemical controls

None listed.

Content authors

Disclaimers

This information comes from the Kansas State University Agricultural Experiment Station and Cooperative Extension Service publication MF743. Information may not be suitable for states other than Kansas.