Arborvitae, American
Symptom Cause  
Leaves or needles wrinkled or curled; discolored, stunted, tend to fall off
Aphids
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Leaf margins notched
Arborvitae Weevils
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Foliage looks bad, small cocoon-like silken bags hang from twigs
Bagworms
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Sawdust at base of shrub; holes in trunk or branches; poor growth
Cedar Tree Borers
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Foliage chewed; striped from twigs
Deer
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When young portions of foliage disappear, or young tips disappear
Deer
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Foliage looks burned
Dog Urine
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Foliage browns; trunk splits near soil
Freeze Injury
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Two tips/leaves turn brown/yellow; die
Fungal Diseases
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Foliage chewed; striped from twigs
Moose
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Internal leaves drop off in spring or fall
Normal
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Foliage chewed; striped from twigs
Rabbits
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Leaves/branches encrusted with bumps
Scale Insects
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Black powdery sooty mold fungus forms on honeydew; branches may die
Sooty Mold
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Leaves webbed over; turn gray or brown
Spider Mites
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Twigs; leaves turn brown; drought
Sun Scorch
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