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Corn > Year-Round IPM Program > Planting to 5th leaf > Pests and Damage

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Corn

Pests and damage to look for during planting to 5th leaf stage:

Click on photos to enlarge
Black cutworm larva.
Cutworms
Identification tips: Grayish or black, 1 inch long, and commonly curl into a C-shape when disturbed; look for holes chewed in leaves and stems. 		Potato flea beetle adult.
Flea beetles
Identification tips: Small brown or black beetles that jump readily; look for numerous small holes in leaves or along leaf veins.		 Larva (top), prepupa (left), and pupae (center) of seedcorn maggot.
Seedcorn maggot
Identification tips: Mature larvae are small whitish maggots; pupae are small brown capsules; adult is light gray fly; maggot feeding will cause slow and spotty stalk emergence.
Sugarbeet wireworm larvae.
Wireworms
Identification tip: Slender, elongate, yellowish to brown with smooth, tough skin; resemble mealworms; seed and root feeders; look in the soil where stands are spotty. 		   

Statewide IPM Program, Agriculture and Natural Resources, University of California
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