Walnuts and Potato Bugs
Date: Around 1999
A friend has discovered that potatoes grown under a walnut
tree have no potato bugs. Is juglone toxic to insects and if so, which?
Check with an entomologist
Juglone's effects on black walnut and other plants has been studied but not
sure about insects.
Anthony R. Brach, Ph.D.
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Update: June 2012