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Insecticide Treatment Options for Corn Earworm in Field Corn

Updated December 20, 2011

Economic Threshold for Seed Corn:

10 eggs per 100 plants if silks are removed and examined for eggs outside the field,
OR 10% of the plants with eggs if examined in the field (Purdue University).

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 3 = Sodium channel modulators
  • Group 5 = Nicotinic acetylcholine receptor agonists (allosteric), Spinosyns
  • Group 28 = Ryanodine receptor modulators, Diamides
R = Restricted-Use Product

Mode Of
Action
Product
Name
Common
Name
Rate
(Formulation/Acre)
Restrictions/Comments
3 R Ambush 2E permethrin

6.4-12.8 oz

  
3 R Arctic 3.2EC permethrin 4-6 fl oz

PHI 30 days for grain or fodder.
3 R Asana XL esfenvalerate

5.8-9.6 oz

  
3 R Baythroid XL cyfluthrin 1.6-2.8 fl oz

PHI 21 days for grain or fodder. REI 12 hrs.
28 Belt flubendiamide 2-3 fl oz

PHI 1 day for green forage and silage and 28 days for grain or stover.
3 R

Brigade 2EC,
Fanfare 2EC

 bifenthrin 2.1-6.4 fl oz

Field corn (grain and silage), popcorn and seed corn. Apply in a minimum of 2-5 gallons of spray per acre by aircraft or 10 gallons per acre with ground equipment. Do not apply within 30 days of harvest.
1B, 3 R Cobalt

chlorpyrifos and
gamma-cyhalothrin

 19-38 fl oz

PHI 21 days for grain and 14 days for silage and grazing.
28 Coragen rynaxypry

3.5-5.0 fl oz
3 R Delta Gold deltamethrin 1.5-1.9 fl oz

PHI 21 days for grain or fodder and 12 days for grazing. REI is 12 hours. Highly toxic to bees.
3 R Hero

zeta-cypermethrin
and bifenthrin

 4.0-10.3 fl oz PHI 30 days for grain and 60 days for forage. REI 12 hours.
1A Lannate LV methomyl 0.75-1.5 pts

Do not apply more than 2.25 lb ai per acre per crop.
1A Lannate SP methomyl 0.25-0.50 lb

Do not apply more than 2.25 lb ai per acre per crop.
3 R Mustang Max EC,
Respect		 zeta-cypermethrin 1.76-4.0 oz

A 24c label with a 1-day PHI for use on seed corn, field corn and popcorn. This labeling must be in the possession of the user at the time of pesticide application.
1B Nufos 4E chlorpyrifos 1.5-2.0 pts

Apply 2-5 gal of spray per acre by air.
3 R Pounce 25WP permethrin 6.4-9.6 oz

Do not make treatments less than 6 days apart. Up to 0.6 lb ai may be used per season.
3 R Proaxis gamma-cyhalothrin 1.92-3.20 fl oz

Apply a minimum of 2 gal of spray per acre by air.
5 Radiant SC spinetoram 3-6 fl oz

Apply broadcast or direct spray to ear zone.
1A Sevin 4F carbaryl 1-2 qts

Repeat applications as needed up to a total of 4 times, but not more than once every 14 days. Do not apply within 48 days of harvest of grain and fodder or within 14 days of harvest of forage or silage.
1B, 3 R Stallion

chlorpyrifos +
zeta-cypermethrin

 9.25-11.75 fl oz PHI 30 days for grain or stover and 60 days for forage.
3 R Steed

zeta-cypermethrin
and bifenthrin

 3.5-4.7 fl oz PHI 30 days for grain and 60 days for forage.
5 Tracer spinosad 2-3 fl oz

Do not apply more than 6 fl oz per acre per year. Do not apply within 28 days of grain harvest or within 3 days of forage or fodder harvest.
3 R

Warrior w/
Zeon Technology,
Silencer

 lambda-cyhalothrin 1.92-3.20 fl oz

When applying by air, apply in a minimum of 2 gals of water/acre.
3 R

Warrior II w/
Zeon Technology

 lambda-cyhalothrin 0.96-1.60 fl oz