Geocoris big-eyed bugs are predators in a family of bugs that mostly feed on seeds and plants (Lygaeidae). Both nymphs and adults are very fast moving, and can frequently be seen scurrying on the soil, in leaf litter, and on plant leaves. They capture prey and suck body fluids through specialized mouth parts.
Biology
Big-eyed bugs are present throughout the Columbia Basin, and are common in or near
most potato fields.
Adult big-eyed bugs are present in early spring and colonize potato fields early.
They are sensitive to many insecticides — care must be taken to preserve them.
Big-eyed bugs are generalist predators, feeding on almost any insect small enough for
them to catch, but they are a major predator of aphids in potatoes.
Big-eyed bugs are small, a little bigger than aphids.
There are two major types of big-eyed bugs in potatoes.
The lighter type on the left is far more common than the black one.
Young big-eyed bugs look a lot like adults, but don't have wings.
