Mugo Pine, Dwarf
Symptom Cause  
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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Major damage to foliage
Deer
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Swelling develop on branches, trunk; growth beyond gall stunted
Eastern Gall Rust
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New shoots fade, redden; droop, lose needles
European Corn Borers
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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 discolored; drop prematurely
Needle Cast (fungus)
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Crown needles turn yellow, then to reddish brown; small holes in trunk; tunnels under bark
Pine Bark Beetle
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Sticky bud tips; needles turn yellow
Pine Shoot Beetles
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Frothy mass of bubbles, base of needles;
Pine Spittlebugs
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Brown nests of silk, brown needles; branches stripped
Pine Webworms
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Needles, wilt, yellow, brown; branches die
Pine Wilt (fungus)
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Tree yellows, grows poorly; branches die
Root Nematodes
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Cream colored blisters; rupture release orange spores
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 fungus forms on honeydew; plants 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
White Pine Weevils
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White, wooly masses on needles and trunk
Wooly Aphids
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