Small grain-Omnivorous leaftier

Cnephasia longana

Pest description and crop damage Larvae are about 0.625 inch long when mature, with a tan head; the body is yellowish or gray with a lighter stripe on each side of the back.

This is a pest of vetch; occasionally it attacks wheat heads in fields where vetch grows. It is most common west of the Cascades.

Management-chemical control

Damage rarely is enough to justify chemical control, except in the Willamette Valley of Oregon. Some insecticides are registered in Oregon to control this pest; see labels for rates.