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Kohlrabi-Cutworm Includes Black cutworm (Agotis ipsilon) Variegated cutworm (Peridroma saucia) Pest description, crop damage and life history See: Common Pests of Vegetable Crops Biology and life history During mild winters, the black cutworm overwinters ...

Kohlrabi-Diamondback moth Plutella xylostella Pest description, crop damage and life history See: Common Pests of Vegetable Crops Pest monitoring Natural enemies and insecticides applied to control other pests keep the diamondback moth under satisfactory ...

Kohlrabi-Flea beetle Includes cabbage flea beetle (Phyllotreta cruciferae) Pest description, crop damage and life history See: Common Pests of Vegetable Crops Pest monitoring Monitor fields for flea beetles soon after transplanting or as seedlings emerge. ...

Kohlrabi-Imported cabbageworm Pieris rapae Pest description, crop damage and life history See: Common Pests of Vegetable Crops Pest monitoring The following information is from California but is generally applicable in the Pacific Northwest. Cabbageworms ...

Kohlrabi-Wireworm Limonius spp. Pest description, crop damage and life history See: Common Pests of Vegetable Crops Management-biological, cultural, tactical See: Potato, Irish-Wireworm Management-chemical control: HOME USE bifenthrin cyfluthrin zeta-cype ...

Leek and shallot-Thrips Includes onion thrips (Thrips tabaci) Pest description, crop damage and life history See: Common Pests of Vegetable Crops Pest monitoring Thrips tend to have clumped distribution both through the field and on individual plants. Thr ...

Lentil-Aphid Includes Bean aphid (Aphis fabae) Green peach aphid (Myzus persicae) Pea aphid (Acyrthosiphon pisum) Pest description, crop damage and life history See: Common Pests of Vegetable Crops Management-cultural control Aphid populations tend to be ...

Lentil-Lygus bug Lygus spp. Pest description, crop damage and life history See: Common Pests of Vegetable Crops Pest monitoring Sweep nets can be used to sample for lygus bugs. In the Pacific Northwest, a suggested treatment threshold is one-half adult or ...

Lentil-Seedcorn maggot Delia platura Pest description, crop damage and life history See: Common Pests of Vegetable Crops Pest monitoring Slow emergence and poor stand establishment are signs of seedcorn maggot activity. Where slow, spotty emergence is obs ...

Lentil-Western yellowstriped armyworm Spodoptera praefica Pest description, crop damage and life history See: Common Pests of Vegetable Crops Pest monitoring Monitoring to catch infestations early is important, because Bacillus thuringiensis (Bt) insectic ...