Apple: Anthracnose (Bull's-eye rot)

Photo by: R.S. Byther
Use IPM (Integrated Pest Management) for successful plant problem management.

Biology
Apple anthracnose, or Bull's-eye rot, typically affects twigs and small branches. Initial infection by the fungus usually occurs in the fall. Young cankers appear as small reddish-brown areas on the bark which enlarge the following spring. Cankers are elongate, reaching their full size (1-10" long) by midsummer. Small branches are often girdled. The bark usually splits away around the sunken cankered area. Fungal fruiting bodies may appear as pustules in the center of the canker. The dead tissue in the canker sloughs off leaving "fiddle strings" across the canker. The spores mature in late summer/early fall. Anthracnose cankers do not enlarge after the first year, but continue to produce spores for several seasons. The disease is primarily a problem west of the Cascades. The fungus may also cause a bull's-eye rot of stored fruit.

Management Options

Select Non-chemical Management Options as Your First Choice!!
Revision Date:5/2/2013
Apply products after harvest and prior to fall rains. Applications may not be effective if not done in conjunction with canker removal. If the fruit rot stage is a problem, make applications pre-harvest according to label instructions. Homeowners should not make foliar applications to trees over 10 ft tall. Consult a commercial pesticide applicator for treatment of trees and shrubs over 10 ft. tall.

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Hortsense web site created by Carrie Foss, Pesticide Education, and Art Antonelli, Extension Entomology, WSU Puyallup
Pesticide information review provided by Catherine Daniels, Washington State Pest Management Resource Service
Database programs developed for Hortsense by Kathleen Duncan, Computer Resources, WSU Pullman
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