University of Nebraska Entomology - Insecticides for Control of Head-Clipper Weevils in Sunflower

University of
Nebraska

Department
of Entomology

Insecticides for Control of Head-Clipper Weevils in Sunflower

Updated May 5, 2006 by Gary Hein and John Thomas

Economic Threshold:
Damage from this insect is nearly always limited to field margins, and treatment is seldom justified. Consider insecticide treatment if more than 50% of the plants examined have weevils present and head-clipping exceeds 5% across the field.

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 3 = Sodium channel modulators
R = Restricted-Use Product	* = Suitable for chemigation	ai = active ingredient	REI = Re-Entry Interval

Mode of Action	Product Name	Common Name	Rate (Formulation/Acre)	Restrictions/Comments

3 R	Baythroid 2*	cyfluthrin	2 - 2.8 oz	Do not apply within 30 days of harvest. REI 12 hrs.
3 R	Proaxis*	gamma-cyhalothrin	2.56 - 3.84 oz	Do not apply within 45 days of harvest. REI 24 hrs.
3 R	Warrior,* generics	lambda-cyhalothrin	2.56 - 3.84 oz	Do not apply within 45 days of harvest. REI 24 hrs.

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