As Japanese beetles are spreading throughout Iowa and populations are increasing, more and more gardeners are dealing with these very hungry garden pests. Japanese beetle adults feed on a wide variety of plants. Their feeding damage is usually easy to distinguish from other leaf feeding insects because they do not eat the veins, leaving lacy-looking leaves.
|Least Favored By Japanese Beetles||Most Favored by Japanese beetles|
Euonymus sp. (burning bush, etc.)
Northern red oak
Red and silver maples
Tulip poplar (tuliptree)
American and English elm
Japanese* and Norway maple
Malus spp. (crabapple, apple etc.)
Prunus spp. (flowering cherry, etc.)
* May not be hardy or perform well throughout Iowa.
** Scots and Austrian Pine are not recommended because of disease problems.
Adult Japanese beetle. Photo by Michele Olson.