Insecticide Treatment Options for Corn Earworm in Field Corn

Updated February 14, 2017

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).

Go to https://www.greenbook.net or other resource for additional registrations.
*Consult product label for specific 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 2EC
permethrin
6.4-12.8 fl oz
 PHI 30 days for grain or fodder (stover). Forage may be harvested on the day of application. Apply just before silking.
3 R Arctic 3.2EC permethrin 4-6 fl oz PHI 30 days for harvest of grain or fodder (stover). Forage may be harvested on the day of application. Apply just before silking.
3 R Asana XL esfenvalerate 5.8-9.6 oz PHI 21 days. First application should be at or before silking.
3 R Baythroid XL cyfluthrin 1.6-2.8 fl oz PHI 21 days for grain or fodder and 0 days for green forage.
28 Belt SC flubendiamide 2-3 fl oz PHI 1 day for green forage and silage and 28 days for grain or stover.
3, 28 R Besiege lambda-cyhalothrin,
chlorantraniliprole		 5-10 fl oz PHI 21 days. Do not feed treated corn fodder or silage to meat or dairy animals within 21 days after last treatment. For control before the larva bores into the plant stalk or ear.
3 R Brigade 2EC,
Fanfare 2EC,
Bifenture EC,
Discipline 2EC,
Sniper,
Tundra EC		 bifenthrin 2.1-6.4 fl oz PHI 30 days. Do not graze livestock in treated area or cut treated crops for feed within 30 days of treatment.
1B, 3 R Cobalt chlorpyrifos and
gamma-cyhalothrin		 19-38 fl oz PHI 21 days for grain, ears, forage or fodder.
1B, 3 R Cobalt Advanced chlorpyrifos and
gamma cyhalothrin		 16-38 fl oz PHI 21 days for grain, ears, forage or fodder.
28 Coragen rynaxypry 3.5-7.5 fl oz

 PHI 14 days.
3 R Declare gamma-cyhalothrin 0.77-1.28 fl oz PHI 21 days for grain, livestock grazing or silage harvest.
3 R Delta Gold deltamethrin 1.5-1.9 fl oz PHI 21 days for grain or fodder. PHI 12 days for cutting or grazing for forage.
3 R Fastac EC alpha-cypermethrin 1.8-3.8 fl oz For control before the larva bores into the plant stalk or ear. PHI 30 days for grain and stover. PHI 60 days for forage.
3 R Hero zeta-cypermethrin
and bifenthrin		 4.0-10.3 fl oz PHI 30 days for grain or stover and 60 days for forage. Do not graze livestock in treated areas or cut treated crops for feed within 30 days of the last application.
1A Lannate LV methomyl 0.75-1.5 pts PHI 21 days for ears and stover, and 3 days for forage.
1A Lannate SP methomyl 0.25-0.50 lb PHI 21 days for ears and stover, and 3 days for forage.
1B R Lorsban Advanced,
Lorsban 4E,
Govern 4E,
Hatchet,
Nufos 4E,
Warhawk,
Yuma 4E		 chlorpyrifos 1.5-2.0 pts PHI 21 days before harvest of grain, ears, forage or fodder.
3 R Mustang Maxx,
Respect		 zeta-cypermethrin 1.76-4.0 oz Apply before the larvae enter the ear. PHI 30 days for grain and stover. PHI 60 days for forage.
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.
28 Prevathon chlorantraniliprole 14-20 fl oz PHI 14 days for harvest of ears and 1 day for forage, fodder, silage or stover.
3 R Proaxis gamma-cyhalothrin 1.92-3.20 fl oz For control before larvae enter the ear. PHI 21 days.
5 Radiant SC spinetoram 3-6 fl oz PHI 28 days for grain and 3 days for fodder or forage. Apply broadcast or direct spray to ear zone.
1A Sevin XLR Plus carbaryl 1-2 qts PHI 48 days for grain and fodder or 14 days for grazing and 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 or stover and 60 days for forage. Do not graze livestock in treated areas or cut treated crops for feed within 30 days of the last application.
5 Tracer spinosad 2-3 fl oz PHI 28 days for grain and 3 days for fodder or forage harvest.
1B, 3 R Tundra Supreme chlorpyrifos
and bifenthrin		 5.6-16.8 fl oz PHI 30 days for grain and silage.
3 R Warrior w/
Zeon Technology,
Silencer		 lambda-cyhalothrin 1.92-3.20 fl oz For control before the larvae bores into the ear. PHI 21 days for harvest, grazing or cutting treated crops for feed.
3 R Warrior II w/
Zeon Technology		 lambda-cyhalothrin 0.96-1.60 fl oz For control before the larvae bores into the ear. PHI 21 days for harvest, grazing or cutting treated crops for feed.