Arborvitae, Oriental
Symptom Cause  
Leaves or needles wrinkled or curled; discolored, stunted, tend to fall off
Aphids
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Black powdery sooty mold forms on Honeydew; branches may die
Aphids
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Leaves turn brown at tips
Arborvitae Leafminer
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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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When young portions of the foliage disappear, or young tips disappear
Deer
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Foliage looked burned
Dog Urine
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Foliage browns; trunk splits near soil
Freeze Injury
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Twig tips turn brown; die back
Juniper Blight (fungus)
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Twigs turn brown
Moisture Stress
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Internal leaves drop off in spring or fall
Normal
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Leaves and branches encrusted with small bumps
Scale Insects
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Black powdery sooty mold forms on Honeydew; branches may die
Sooty Mold
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Leaves webbed over, turn gray/brown
Spider Mites
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Leaves turn brown in early Spring
Sun Scorch
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Leaves near branch tips turn brown
Tip Blight
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