Using Geraniums As Japanese Beetle Control
Submitted by David Trammel on Sat, 06/18/2022 - 05:19
Though the mechanism is not quite understood, it looks like Geraniums are toxic to the Japanese beetle.
https://academic.oup.com/ee/article/32/4/873/358606
Might be time to put a few out around the garden, since we are starting to see the beetles emerge.