Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00000218
11/12/99
BETULA DISEASE PROBLEMS
Several fungi cause canker diseases on birch. These
diseases infect and kill sapwood causing sunken areas on
the trunk (Vis. 1) and larger branches. There is no
chemical control for canker diseases. Preventive measures
include keeping the tree healthy and avoiding wounding.
Regular fertilization will keep birches vigorous and more
resistant to cankers. Water in dry weather to prevent
water stress.
Dieback is characterized by a slow dieback of the
branches. The tree crown accumulates dead branches.
Injury caused by bronze birch borer is similar and far
more prevalent. Prevent dieback by maintaining tree vigor
with water and fertilizer. When the disease does occur
prune out dead branches and increase tree vigor.
Related information.
Pesticide Recommendations
Cankers
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This file was generated from data base ZZ on 01/19/00.
Data base ZZ was last revised on 11/12/99.
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