• Wireworm
• Seedcorn Maggot
• Seedcorn Beetle
• White Grubs
• Black Cutworm
• Corn Flea Beetle
• Slugs
• True Armyworm
• Potato Stem Borer

Early Season Pests (At Planting to Knee High)

Wireworm

1. Millipede	2. Wireworm is 7-35mm long	3. Wireworm larva, pupa and adult	4. Click beetle is the adult wireworm
5. False wireworm is soft bodied	6. Wireworm bait station	7. seed damaged by wireworm	8. injured seedlings appear wilted
9. Wireworm is copper- brown in colour	10. size comparison of wireworm to corn seedling	11. root feeding by wireworm	12. Wireworm feeding results in reduced stands

Seedcorn Maggot

1. Seedcorn maggot stages of development	2. close-up of seedcorn maggot pupa	3. close-up of seedcorn maggot adult	4. maggots a problem when emergence delayed
5. maggots burrowing into the seed	6. Seedcorn maggot damage to seedling

Seedcorn Beetle

1. Seedcorn adults are the damaging stage

2. beetles are brown in colour

3. beetles attack the endosperm

White Grubs

1. grubs are white in colour	2. grubs are C-shaped	3. grub and pupal stage	4. June beetle
5. Japanese beetles	6. European chafer has Y-shaped rastor pattern	7. June beetle rastor pattern	8. European chafer field damage
9. European chafer damage at front of field, Bt resistant variety behind	10. white grub damage to roots	11. root feeding from chafer larva cause wilting

Black Cutworm

1. size comparison of larvae with a penny	2. adult cutworm	3. full grown cutworm larvae
4. cutworm adult in flight	5. plant cut at soil level by cutworm larva	6. cutworm feeding damage to corn seedling
7. cutworm larva	8. plant cut by cutworm larva	9. Sandhill cutworm has a tan head and transparent skin

Corn Flea Beetle

1. flea beetle adult is tiny	2. flea beetle is a shiny black colour	3. adult has enlarged hind legs for jumping	4. flea beetle can cause extensive leaf damage
5. window-pane feeding by flea beetle	6. close-up of flea beetle	7. flea beetle feeding scratches run parallel with leaf veins

Slugs

1. Slug eggs

2. Slug adult

3. Slugs leave slime trails

4. extensive leaf damage by slugs

True Armyworm

1. armyworm instars 2 through 5	2. mature armyworm larva	3. adult armyworms	4.parasitized armyworm
5. diseased armyworms	6. armyworm identification key	7. armyworm feeding on corn seedling	8. armyworm larvae strip leaves leaving midrib and stalk
9. armyworm damage to young seedlings	10. close-up of armyworm larva showing bands on prolegs

Potato Stem Borer

1. Potato stem larva mine into base of plant