Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00001259
11/12/99
ROBINIA INSECT PROBLEMS
Locust borer adults have long antennae and are black
with yellow markings. The larvae bore into the trunks.
The trees are fairly tolerant of small populations of
borers. Keep trees healthy by fertilizing. Pesticides
can be applied to the lower trunk in spring as leaves are
unfolding.
Carpenterworm also bores in the trunk and branches of
locust. The larvae are white to pink and have brown
tubercles.
Scales can be controlled with sprays applied when crawlers
are active.
Spider mites cause green leaf color to take on a stippled
appearance.
Related information.
Pesticide Recommendations
Spider Mites
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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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