Fir, White
Symptom Cause  
Leaves or needles wrinkled or curled; discolored, stunted, tend to fall off
Aphids
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Foliage looks bad, small cocoon-like silken bags hang from twigs
Bagworms
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Needles and twigs discolored; stunted needle and twig
Blight (fungus)
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Girdling lesions on trunk and branches
Canker (fungus)
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Leaves consumed; conspicuous tawny egg masses present on trunk
Caterpillar of Gypsy Moth
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When young portions of foliage disappear
Deer
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Needles discolored; drop prematurely
Needle Cast (fungus)
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Bark of trunk and roots gnawed
Rodent Injury
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Small bumps on leaves and stems
Scale Insects
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Black powdery sooty mold fungus forms on honeydew; branches may die
Sooty Mold
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Leaves stippled, yellowing or bronze; dry out and drop may be webbing visible
Spider Mites
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Needles and buds eaten out; defoliation
Spruce Budworm
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