Pine, Austrian
Symptom Cause  
New needles flecked yellow; tips redden, die; needles drop
Air Pollution
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Needles wrinkled or curled; discolored, stunted, tend
Aphids
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One or more masses of 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 stunted; limbs die back; growth stunted; low branches go first
Diplodia-Tip-Blight (fungal)
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New growth on tree top yellows, then browns, whole tree browns
Engraver Beetle
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Shoots fade/turn red/droop, needles drop
European Pine Shoot Borer
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Cream colored rough scaly bumps with black dot on one end of branches
Irregular Pine Scale
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Needles tips yellowed
Needle Cast (fungus)
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Crown needles turn yellow/reddish brown/small holes in trunk/bark tunnels
Pine Bark Beetle
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Foliage looks bad; small 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 turns yellow, grows poorly; branches die
Root Nematodes
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Cream colored blisters on needles in spring; young trees stunted
Rust (on plants)
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Needles wilt; cankers on trunk; blister
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; holes
White Pine Weevils
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White, wooly masses covering needles or trunk
Wooly Aphids
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