Pine, Japanese Black
Symptom Cause  
New needles flecked yellow; tips redden; die; needles drop
Air Pollution
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Needles wrinkled or curled; discolored, stunted, tend to fall off
Aphids
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One or more masses sticky cream, yellow, pinkish pitch; larva under masses
Caterpillar Pitch Moth
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When young portions of foliage disappear, or young tips disappear
Deer
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New growth on tree top yellows, then browns, whole tree browns
Engraver Beetle
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New shoots fade, redden; droop, lose needles
European Pine Shoot Borer
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Cream colored rough scaly bumps with black dot on end of branches
Irregular Pine Scale
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Needle tips yellowed
Needle Cast (fungus)
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Crown needles turn yellow/then reddish brown/holes in trunk; tunnels under bark
Pine Bark Beetle
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Small white bumps on needles
Pine Needle Scale
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Brown nests of silk, brown needles; branches stripped
Pine Webworms
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Needles wilt yellow, brown; branches die; tree may die
Pine Wilt (fungus)
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Tree yellows, grows poorly; branches die
Root Nematodes
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Needles wilt; cankers on trunk; blister
Rust (on plants)
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Cream colored blisters on needles in spring; young tips disappear
Rust (on plants)
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Needles chewed, branches defoliated
Sawflies
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Black powdery sooty mold fungus forms on honeydew; branches may die
Sooty Mold
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Needles stippled yellow, dirty; silken webbing
Spruce Spider Mite
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Top shoot stops growing/turns yellow; tip droops; white resin on bark; hioles
White Pine Weevils
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