Aster Native
Symptom Cause  
Leaves wrinkled or curled; dis-colored; stunted, tend to fall off
Aphids
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Stems go limp; leaves wilt
Borers
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Leaves and stems eaten; plant disappears
Deer
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White coating on leaf lower surfaces
Downy Mildew
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Holes in leaves and flowers
Japanese Beetles
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Foliage turns pale or mottled
Lacebugs
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Leaves spotted; turn brown and fall off
Leaf Spot
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Leaves mottled; flowers malformed
Mosaic Viruses
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Leaves covered with white powder
Powdery Mildew
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Orange powdery spots on leaves
Rust (on plants)
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Ragged holes in leaves
Slugs and Snails
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Silvery white streaks on flowers/leaves
Thrips
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Yellowing of foliage; gradual defoliation; plants may become stunted
Verticillium Wilt
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Leaves mottled, yellowed; tiny white insects feeding on underside of leaves
Whiteflies
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