Insect Management Handbook

Western spotted cucumber beetle (Diabrotica undecimpunctata)

Pest description and crop damage The western spotted cucumber beetle is the primary species of corn rootworm in the Pacific Northwest. It is yellowish green, 0.25 inch in length, and has 11 black spots on its wing covers. Mature larvae are white except for the head and last abdominal segment, which are brown. They are about 0.62 inch long. The larvae appear to have two heads.

Western spotted cucumber beetle (Diabrotica undecimpunctata)

Pest description and crop damage The adult of the corn rootworm, also known as the western spotted cucumber beetle, is yellowish green, 0.25 inch in length, and has 11 black spots on its wing covers. Mature larvae are white, except for the head and last abdominal segment, which are brown. They are about 0.62 inch long. The larvae appear to have two heads.

Helicoverpa zea

Pest description, crop damage and life history

See:

Common Pests of Vegetable Crops

Includes

Beet armyworm (Spodoptera exigua)
Bertha armyworm (Mamestra configurata)
Western yellowstriped armyworm (Spodoptera praefica)

Pest description, crop damage and life history

See:

Common Pests of Vegetable Crops

Includes

Bean aphid (Aphis fabae)
Green peach aphid (Myzus persicae)
Potato aphid (Macrosyphum euphorbiae)

Limonius spp.

Pest description, crop damage and life history

See:

Common Pests of Vegetable Crops

Management-biological, cultural, tactical

See:

Potato, Irish-Wireworm

Includes

Cabbage leafminer (Liriomyza brassicae)
Pea leafminer (Liriomyza huidobrensis)

Pest description and crop damage Adults are small black to gray flies with yellow markings. The body is covered with long, stiff bristles. Larvae are nearly translucent white or yellow and about 0.25 inch long when mature. Eggs are white, cylindrical, and laid singly or in small groups.

Pieris rapae

Pest description, crop damage and life history

See:

Common Pests of Vegetable Crops

Includes cabbage flea beetle (Phyllotreta cruciferae)

Pest description, crop damage and life history

See:

Common Pests of Vegetable Crops

Plutella xylostella