I have the JB beetle in my Linden and Birch tree. Will the beetle kill the trees?
Olmsted County Minnesota
If your linden and birch are well established trey should be fine despite leaf damage from Japanese Beetles. Newly planted trees are more succeptable to long term damage. Decreasing beetles will assist in continued Japanese Beetle life cycle. Dropping the beetles in a bucket of soapy water is the least invasive method. This is best done early AM or later afternoon when they are less active. I have placed a link below with more information about the beetle life cycle and eradication methods. http://www.extension.umn.edu/garden/insects/find/japanese-beetles/