Collard
Symptom Cause  
Leaves wrinkled or curled; discolored, stunted, tend to fall off
Aphids
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Leaves, stems and buds eaten
Armyworms
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Holes in leaves
Cabbage Loopers
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Seedling cut off at soil
Cutworms
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Plants disappear all or in part
Deer
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Small holes on older leaves; growing tip chewed out on young plants causing stunting; small caterpillars wiggle frantically when disturbed. Body wide in middle tapered at both ends.
Diamondback Moth Caterpillar
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White powder on leaf undersides; foliage wilts
Downy Mildew
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Leaves riddled with shot holes; plant weakens
Flea Beetles
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Yellowing of foliage and gradual defoliation; plants may become stunted
Fusarium Wilt
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White butterflies; ragged holes in leaves, bit of green excrement on leaves
Imported Cabbageworms
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Tip of leaves brown, internal larvae trails visible.
Leaf Miners
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Mottled, crinkled foliage; brown specks appear on fruit, and plants may droop and die prematurely
Mosaic Viruses
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Plant stunted, yellow leaves, lesions on roots
Nematodes
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White dust like on tops of leaves
Powdery Mildew
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Plants disappear all or in part
Rabbits
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Young plants wilt in heat, may yellow/die
Root Maggots
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Ragged holes in middle of leaves
Slugs
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Plants disappear all or in part
Woodchucks
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