Seed Corn Best Management Practices for Ontario
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Seed Corn Insect Images 1 - Early Season Pests
Browse:
Early Season Pests (At Planting up to Knee High)
Insect Pests at Knee High to Maturity
Beneficial Insects
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Table of Contents
Wireworm
Seedcorn Maggot
Seedcorn Beetle
White Grubs
Black Cutworm
Corn Flea Beetle
Slugs
True Armyworm
Potato Stem Borer
Click on the thumbnail or the image name to view the larger picture
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
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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
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Seedcorn Beetle
1.
Seedcorn adults are the
damaging stage
2.
beetles are
brown in colour
3.
beetles attack
the endosperm
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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
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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
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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
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Slugs
1.
Slug eggs
2.
Slug adult
3.
Slugs leave
slime trails
4.
extensive leaf
damage by slugs
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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
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Potato Stem Borer
1.
Potato stem larva
mine into base of plant
For further information:
msantavy@seedcorngrowers.on.ca
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