Chinese elm anthracnose. Identification
tip: Irregular,
black, tarlike spots form on leaves; leaves drop and
twigs die back; affects Chinese
elm only.
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Botryosphaeria canker. Identification tip: Branches
turn reddish brown and die back and often exude drops
of yellowish pitch; attacks many species, but especially
Giant Sequoia
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Pine pitch canker.
Identification tip: Dark, reddish pitch appears
on pine limbs or trunk; branches may die; affects pine
trees only.
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Nectria canker.
Identification tip: Reddish
lesions on young shoots or spurs; concentric ridges
develop around the dead tissue; affects hardwood
tree species
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Cytospora canker.
Identification tip: Sunken, smooth, roughly elliptical,
reddish brown cankers appear; affects many broadleaf
and needle species
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Cypress canker.
Identification tip: Resinous lesions form on infected
bark; fungus can girdle limbs; affects only cypress
trees, especially Cupressocyparis
leylandii
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