Stem cankers and dieback—Botryosphaeria dothidea,
Cryptosporella umbrina, and others
The fungi that cause stem cankers and dieback infect through wounds and may be spread or promoted by
water and rain. Brown cankers, sometimes with gray centers, develop. Small, black, spore-producing structures appear
on dead tissue.
Solutions
Provide proper cultural care to keep plants vigorous. Prune off diseased or dead tissue,
make cuts at an angle in healthy tissue and just above a node. Avoid otherwise wounding tissue. Avoid
overhead water.
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Botryosphaeria
canker
Oozing of canker and drying of foliage
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