Corn Insect Pests
Southern Corn Leaf Beetle
Description: Adult beetles are about 3/16 of an inch long with a grayish or brownish color pattern. They are usually covered with soil particles, giving them a dusty appearance.
Damage Symptoms: Beetles feed on the edges of leaves and stems, producing notched holes in the leaves.
Incidence: May, on seedling corn.
Sampling Scheme: None available.
Economic Threshold: Use cutworm thresholds to determine the need to treat.
Corn Cutworms, NebGuide 1153
Cutworms — identification of specific cutworms, conditions favoring infestations, potential damage and control.
Common Stalk Borer in Corn, NebGuide 521
The life history and appearance of common stalk borers is described, along with information on damage they can cause, economic injury levels and ways to control them in corn.
Western Bean Cutworm in Corn and Dry Beans, NebGuide 2013
Western Bean Cutworm Speed Scouting Spreadsheet, EC1585
Scouting and Treating Western Bean Cutworms
Chinch Bug Management, Nebguide G806
- More wireworm images from Entomology at UNL
- More seed corn maggot images from Entomology
Cereal Aphids NebGuide
Identification and general discussion of the cereal aphid species most commonly found in Nebraska small grains, corn, sorghum and millet.
Description: Small blue/green, usually wingless insects in the whorl and tassel.
Damage Symptoms: Feeds by sucking juices from corn plant; does not inject salivary toxins.
Incidence: Throughout the growing season.
Sampling Scheme: Examine 5 sets of 20 plants during late whorl stage and tassel emergence.
Corn Rootworm Larvae
University of Nebraska Field Trial Results Seed treatments, Planting-time treatments, Post-plant or rescue treatments.
1st Generation European Corn Borer Scouting and Treatment Decisions
2nd Generation European Corn Borer Treatment Decision Worksheet
2nd Generation European Corn Borer Scouting Spreadsheet