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Onion-Onion maggot and seedcorn maggot Includes Onion maggot (Delia antiqua) Seedcorn maggot (Delia platura) Pest description and crop damage Onion maggot eggs are white, elongated, and about 0.04 inch long and are laid on the soil near the stem and occas ...

Onion-Thrips Includes Onion thrips (Thrips tabaci) Western flower thrips (Frankliniella occidentalis) Pest description and crop damage See: Common Pests of Vegetable Crops Thrips infestations can reduce onion yield by as much as 20%. Onion thrips also vec ...

Onion-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 zeta-cypermethrin Management-chemi ...

Parsley-Aphid Includes green peach aphid (Myzus persicae) Pest description, crop damage and life history See Common Pests of Vegetable Crops Management-cultural control Aphid populations tend to be higher in plants that are fertilized liberally with nitro ...

Parsley-Armyworm, cutworm, and looper Includes Beet armyworm (Spodoptera exigua) Bertha armyworm (Mamestra configurata) Western yellowstriped armyworm (Spodoptera praefica) Black cutworm (Agotis ipsilon) Variegated cutworm (Peridroma saucia) Alfalfa loope ...

Parsnip-Aphid Includes Bean aphid (Aphis fabae) Green peach aphid (Myzus persicae) Willow-carrot aphid (Cavariella aegopodii) Pest description and crop damage The willow-carrot aphid is green to greenish yellow. Its primary host is willow, but it feeds on ...

Parsnip-Armyworm and cutworm Includes Beet armyworm (Spodoptera exigua) Bertha armyworm (Mamestra configurata) Western yellowstriped armyworm (Spodoptera praefica) Black cutworm (Agotis ipsilon) Variegated cutworm (Peridroma saucia) Pest description, crop ...

Parsnip-Carrot rust fly Psila rosae Pest description, crop damage and life history See Common Pests of Vegetable Crops Pest monitoring Orange or yellow sticky traps can be used to monitor for carrot rust fly. In Ontario, Canada, an action threshold of one ...

Parsnip-Flea beetle Includes Epitrix spp. Pest description, crop damage and life history See Common Pests of Vegetable Crops Management-chemical control: HOME USE azadirachtin (neem oil)-Some formulations are OMRI-listed for organic use. bifenthrin carbar ...

Parsnip-Leafhopper Includes six-spotted leafhopper (Macrosteles quadrilineatus) Pest description, crop damage and life history See Common Pests of Vegetable Crops Pest monitoring Leafhoppers are collected easily with sweep nets. Yellow sticky traps also c ...