Texas Cooperative Extension, Texas A&M University System
Department of Entomology, Texas A&M University
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Big-eyed Bug
 
Big-eyed bug, Geocoris sp. Photo by Drees.
Click on image to enlarge
 
A big-eyed bug,
Geocoris sp.
(Hemiptera: Lygaeidae), adult.
Photo by Drees
Big-eyed bug, Geocoris sp. Photo by W. Sterling and S. Gravena.
 
A big-eyed bug,
Geocoris sp.
(Hemiptera: Lygaeidae),
nymph.
Photo by W. Sterling and S. Gravena
 

Common Name: Big-eyed bug
Scientific Name: Geocoris sp.
Order: Hemiptera

Description:
Several species are found in Texas, with Geocoris punctipes (Say), a large gray species, and G. uliginosus (Say), a small black species, being common in cotton fields. Species range is size from 1/8 to 1/4 inch long and have broad heads with large, curbed, backward-projecting eyes. Immature stages (nymphs) resemble adults but do not have fully developed wings.

Life Cycle:Adults overwinter and lay eggs on plants. Nymphs hatching from eggs develop through 5 stages before becoming winged adults.

Habitat and Food Source(s), Damage:Nymphs and adults are general predators, feeding on small caterpillars and caterpillar eggs, fleahoppers, lygus bugs, mites, thrips, whiteflies. They will also feed on various seeds and suck plant juices but are not considered to be injurious to plants. They occur in most crops and landscapes.

Pest Status:Predaceous nymphs and adults are beneficial; medically harmless.

Management: None, this is a beneficial insect.

For additional information, contact your local Texas A&M AgriLife Extension Service agent or search for other state Extension offices.

Literature: Bohmfalk et al. 1982;Kogan and Herzog 1980.

From the book:
Field Guide to Texas Insects,
Drees, B.M. and John Jackman,
Copyright 1999
Gulf Publishing Company,
Houston, Texas

A Field Guide to Common Texas Insects, Bastiaan M. Drees and John A. Jackman.
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