Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00001540
11/12/99
WEIGELA INSECT PROBLEMS
Four-lined plant bug makes brown spots on the leaves. The
injury is not serious and is often mistaken for a disease.
Japanese beetle feeds on weigela. Pesticides may not be
effective if beetle populations are high. The grubs in
the lawn can be controlled with pesticides or milky spore
disease.
Inspect the stems of unhealthy-looking plants to see if
scales are present. Overwintering stages can be
controlled with sprays of dormant oil. The preferred
method of control involves regular inspection for early
detection then spraying with dormant oil.
Related information.
Pesticide Recommendations
Four-lined Plant Bug
Japanese Beetle
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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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