Botryosphaeria Canker

Pest: Botryosphaeria Canker (Botryosphaeria dothidea, Cryptosporella umbrina, etc.)

Pest Type: Infectious disease

Botryosphaeria_rhodina

Major Identifying Features: Brown cankers sometimes with gray centers develop, small black spore-producing structures appear on dead tissue

Life Cycle: Botryosphaeria spread by spores

Pest Rating: Moderate

Management Rating: Moderate

Host/Season/Outbreak Information: The fungi that cause stem cankers and dieback infect through wounds and may be spread or promoted by water and rain

Damage Information: Damages branches twigs and branches on trees

Management Options:  Proper cultural care to keep plants vigorous, mechanical control by pruning off diseased or dead tissue, making cuts at an angle in healthy tissue and just above a node, avoiding overhead watering

Sources:

http://www.ipm.ucanr.edu

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