Spruce, White
Symptom Cause  
Leaves defoliated; foliage looks bad, small cocoon-like silken bags hang from twigs; twigs girdled
Bagworms
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Many holes in trunk and branches; small limbs girdled sawdust at holes
Borers
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Wilting; new growth deformed
Budworm
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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, or young tips disappear; shredded bark on trunk
Deer
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Shelf-like growths erupt from trunk
Lichens
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Leaves stippled, yellow/bronze; dry out and drop, webbing visible; galls on leaves
Mite
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Bark of trunk and roots gnawed
Rodent Injury
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Blisters; discoloration on lower needles
Rust (on plants)
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Small caterpillars, usually in high number, grouped together, foliage being eaten
Sawflies
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Needles webbed together; larvae mine needles, which eventually turn brown
Spruce Needle Miners
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