Phytophthora root and crown
rot cankers
Identification tip: To confirm the presence of Phytophthora
crown rot, cut away the outer bark and look for a canker
that has water soaked margins and extends through the inner
bark and cambium.
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Ground squirrel burrows
Identification tip: The burrow openings are about
4 inches in diameter, but can vary considerably.
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Tree squirrel damage
Identification tip: Look for bark chewed off of scaffolds.
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Crown gall
Identification tip: Crown gall appears as rough, abnormal
galls at or below the soil surface on roots or trunk.
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Fall webworm tents
Identification tip: Caterpillars feed inside silken tents,
enlarging the tents to cover more food as available food
is consumed.
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