The following questions were sent to the
diagnosticians here at Purdue University:
Question 1: I have had some SERIOUS problems with japanese
beetles in my yard. They have been attacking some of my trees,
and if it hadn't been for me squishing them with my bare hands,
I'm SURE that I would have lost some of my trees. The main trees
that they were attacking were my pussy willow trees, and my plum
trees. I didn't know what to do. I used the BAG-A-BUG trap, and
it seemed to work for a little bit, but there were just TOO MANY
BEETLES!! Please e-mail me back, and tell me what I can do to
solve my problem.
Answer 1: You can read more about Japanese beetles in
Purdue's extension publication, E-75. Available at the following
Question 2: We live waaaaaay out in the country, surrounded
by acres of fields. Each year, we seem to have more and more
Japanese beetles infesting our roses and strawberry plants, as
well as a number of other plants. Spraying malathion or Seven
helps temporarily, but they JUST KEEP COMING!!! Is there any
way we can slow down or stop the infestation and save our roses?
Answer 2: It sounds as though you are doing the best
you can do. Repeated chemical applications (malathion or sevin)
is the best control against Japanese beetle populations. Also,
if you want, you can replant plants that are resistant to these
beetles. Besides the controls given, there is little you can
do to slow down the Japanese beetles. Good luck!
-- Corey Gerber
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