SWLB2

Corn Management Options

Southern Corn Leaf Beetle

A 3/16- to 1/5-inch long, little-known beetle destroyed large areas within isolated northeastern Kansas corn fields during 1997 and 1998. Before these reports, the insect had not been found damaging corn in Kansas for more than 80 years. Adults are drab in color, grayish to brownish, and may be covered with soil particles. These turbed. Feeding damage reduces plants to fragments and the cause of the injury can be easily mistaken as cutworms. Healthy stands can disappear in a few days if large numbers of beetles descend on a field.

Southern Corn Leaf Beetle Management Options^a
Insecticide	Rate
Beta-cyfluthrin (Baythroid XL)	0.0125 to 0.022 lbs. a.i./acre (1.6 to 2.8 fl. oz.)
Bifenthrin (numerous products)*	0.033 to 0.10 lb. a.i./acre (2.1 to 6.4 fl. oz.)
Chlorpyrifos (numerous products)**	Check label, but generally 1 to 2 pints/acre.
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)	0.025 to 0.044 lb. a.i./acre (1.6 to 2.8 fl. oz.)
Lambda-cyhalothrin (numerous products)***	0.03 lb. of a.i./acre
Lambda-cyhalothrin plus chlorantraniliprole (Voliam Xpress)	9.0 fl. oz./acre
Zeta-cypermethrin (Mustang MAX EC)	0.017 to 0.025 lb. a.i./acre (2.72 to 4.0 fl. oz.)
Zeta-cypermethrin + Bifenthrin (Hero)	4 to 10.3 fl. oz. of product/acre

^a Insecticides Approved for Application on Corn for Southern Corn Leaf Beetles. Observe specific label guidelines in regard to usage restrictions and application techniques. For more information on these insecticides refer to the table at: Corn Insecticide Use Instructions *Bifenthrin is now being marketed under numerous trade names including Annex, Bifenthrin, Brigade, CaptureLFR, Discipline, Empower, Fanfare, Sniper and Tundra. **Chlorpyrifos is now being marketed under numerous trade names including Chlorpyrifos, Eraser, Govern, Lorsban, Nufos, Pilot, Warhawk, Whirlwind and Yuma.

***Lambda-cyhalothrin is now marketed under numerous trade names including Lambda T, Silencer, Taiga Z, and Warrior II with Zeon Technology. From: MF-810, R. Jeff Whitworth, Holly Davis, and J.P. Michaud. Corn Insect Management, Kansas State University.

This publication was prepared to help producers manage insect populations with the best available methods proven practical under Kansas conditions. Pesticide label directions and restrictions are subject to change, and some may have changed since this publication was written. Kansas State University entomologists assume no responsibility for product performance, personal injury, property damage, or other types of loss resulting from the handling or use of the pesticides listed. Remember, it is illegal to use a pesticide in a manner that is inconsistent with the label. The user bears responsibility for correct use. Always read and follow label directions carefully.