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University of Nebraska–Lincoln

Department of Entomology

Insecticide Treatment Options for Greenbugs

Updated October 20, 2003 by ZB Mayo


Planting-Time Treatments
Post Emergence Treatments

Economic Thresholds:
Seedling (0-5 leaves)Treat if greenbug colonies are present on 10-20 percent of plants, and visible yellowing or spotting on leaves is present.
Plants 6 inches tall to bootTreat if greenbug colonies are beginning to cause red or yellow leaf spotting on lower leaves of most plants AND parasite numbers are low (less than 20 percent of greenbugs parasitized).
Boot to headingTreat if greenbug colonies are present on most plants, and have killed one lower leaf,and if parasite numbers are low (less than 20 percent of greenbugs parasitized).
Heading to hard doughTreat if greenbug colonies are present on most plants and have killed two normal-sized leaves, and if parasite numbers are low (less than 20 percent of greenbugs are parasitized.)

For information on biology and management of greenbugs, consult NebGuide G87-838, Management of Greenbugs in Sorghum.

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.


IRAC Mode of Action Classification:
  • Group 1 = Acetylcholine esterase inhibitors; 1A = Carbamates, 1B = Organophosphates
  • Group 4 = Nicotinic acetylcholine receptor agonists/antagonists; 4A = Neonicotinoids
R = Restricted-Use Product


At Planting

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

4A Cruiser (Adage) 5FS
seed treatment
thiamethoxam 5.1 fl oz per cwt Purchase treated seed from seed dealers. There is a 120 day plant-back interval for soybeans and corn.
4A Gaucho
seed treatment
imidacloprid 8.0 oz/cwt of seed Purchase treated seed from seed dealers. There is a 30 day plant-back interval for soybeans and corn.
1B R Thimet 20 G phorate 6 oz/1000 row ft Place granules in a 7-inch band over the row at planting and incorporate into the soil. Do not apply directly on the seed.


Post-Emergence
Mode of
Action
Product
Name
Common
Name
Rate
(Formulation)
Restrictions/Comments

1B Dimethoate 4 EC dimethoate 0.5 - 1.0 pt/acre Apply in 25-40 gallons of water per acre for ground application and in one or more gallons if applied by air. May apply up to 3 applications per year but do not apply after heading.
1B R Lorsban 4 E chlorpyrifos 0.5 - 1.0 pt/acre Apply in sufficient water to obtain thorough coverage. Do not apply more than 3 pints of Lorsban per acre in one season. Treated crop cannot be used for grain, forage, fodder, hay or silage within 30 days after treated with one pint per acre or for 60 days for applications of more than one pint per acre.
1B Malathion 57 EC malathion 1.5 pts/acre Apply in sufficient water to obtain thorough coverage and repeat application if needed.