University of
Nebraska		 Ent Web Logo Department
of Entomology

Insecticides for Control of Grasshoppers in Sugarbeets

Updated March 12, 2003 by Gary Hein and John Thomas

Economic Threshold:
More than eight grasshoppers per square yard in the field margin or more than 20 per square yard in the border would likely warrant control. Adult grasshoppers are much more difficult to control than smaller nymphs, so in years when high grasshopper numbers are present, early treatment of hatching areas before the grasshoppers become adults may reduce later impact.

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
R = Restricted-Use Product * = Suitable for chemigation ai = active ingredient REI = Re-Entry Interval
PHI = Pre harvest interval
Mode of
Action		 Product
Name		 Common
Name		 Rate
Formulation/Acre
(unless otherwise noted)		 Restrictions/Comments
3 R Asana XL esfenvalerate 5.8 - 9.6 oz Do not exceed 0.15 lb. ai/A per season;
PHI 21 days; REI 12 hrs.
1B R Declare, Methyl 4EC methyl parathion 0.5 to 0.75 pt PHI 20 days; REI 5 days.
1B R Lorsban 4E*
Nufos 4E*		 chlorpyrifos 0.5 - 1 pt PHI 30 days; REI 24 hrs.
1B Malathion 57 EC* malathion 3 pts PHI 3 days; REI 12 hrs.
3 R Mustang 1.5 zeta-cypermethrin 2.4 - 4.3 oz PHI 50 days; REI 12 hrs.
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