University of Nebraska

Department of Entomology

Insecticides for Grasshopper Control in Soybeans

Updated April 13, 2007

For information on the biology and management of grasshoppers, refer to NebGuide G86-791-A,
A Guide to Grasshopper Control in Cropland, and NebFact 328, A Guide to Grasshopper Control in Cropland.

This list is not inclusive. See http://www.greenbook.net or other resources for additional registrations.
This information is presented in abbreviated form. Be sure to consult the label for additional information and restrictions.

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IRAC Mode of Action Classification:
Group 1 = Acetylcholine esterase inhibitors; 1A = Carbamates, 1B = Organophosphates Group 3 = Sodium channel modulators Group 15 = Inhibitors of chitin biosynthesis, type 0, Lepidopteran R = Restricted-Use Product
Mode of Action	Product Name	Common Name	Rate (Formulation/Acre)	Restrictions/Comments
3 R	Asana XL	esfenvalerate	5.8 - 9.6 fl oz	Do not exceed 0.2 lb ai. per acre per season. Do not feed or graze livestock on treated plants. 21 day harvest interval.
3 R	Baythroid 2	cyfluthrin	2.1 - 2.8 fl oz	45 day pre-harvest interval or period before feeding of dry vines. Green foliage may be fed 15 days after last application.
1B	Dimethoate 400	dimethoate	1 pt	21-day harvest interval. Do not feed or graze within 5 days of last application.
15 R	Dimilin 25W, 2L	diflubenzuron	2 fl oz	21-day harvest interval. No more than 2 applications per season. Treat when majority of grasshoppers have reached 2nd - 3rd instar.
1A R	Furadan 4 F	carbofuran	¼ - ½ pt	Do not make more than 2 foliar applications per season. Do not apply within 21 days of harvest. Do not graze or feed foliar treated forage to livestock or cut for silage or hay.
1B R	Lorsban 4 E	chlorpyrifos	½ - 1 pt	Do not apply more than 6 pints per acre per season. Do not apply last treatment within 28 days before harvest, nor apply last two treatments closer than 14 days apart. Do not allow livestock to graze in treated acres or otherwise feed treated forage, hay, or straw to meat or dairy animals.
3 R	Mustang	zeta-cypermethrin	3.4 - 4.3 fl oz	Do not graze or harvest treated soybean forages, straw, or hay for livestock feed. Do not apply more than 0.31 lb per acre per season. 21 day harvest interval.
1B R	Penncap-M	methyl parathion	2 - 3 pts	Do not make more than 2 applications per season. Do not use within 20 days of harvest or grazing.
3 R	Proaxis	gamma-cyhalothrin	3.2 - 3.84 fl oz	Do not apply within 30 days of harvest or more than 0.48 pints per acre per season.
3 R	Scout X-TRA	tralomethrin	2.28 - 3.41 fl oz	Do not graze or harvest treated soybean forage, straw or hay for livestock feed. Do not apply more than 17 fl. oz per acre in one growing season. Do not apply within 21 days of harvest
3 R	Warrior 1.0 EC	lambda- cyhalothrin	3.2 - 3.84 fl oz	Do not graze or harvest treated soybean forage, straw or hay for livestock feed. Do not apply within 45 days of harvest. Do not apply more than 0.48 pints per acre per season.