Popillia japonica

Reports of noticeable numbers of Japanese Beetles (Popillia japonica) were on the rise last week in Ohio. Thus far, population distribution is highly localized. This population pattern has been typical for Japanese beetles in Ohio for many years. A short drive can take you from a location with high numbers to another location with virtually no beetles.

After getting off to a late, slow start this season, Japanese Beetle numbers have risen dramatically with high populations being reported in various parts of the state. However, not everyone is seeing heavy damage. Thus far, the population distribution is remaining highly localized.

Dave Shetlar (OSU Entomology, Professor Emeritus) and I had a conversation early last week about what had become of Japanese beetles this season. Neither of us had yet seen our first adults in central and southwestern Ohio, respectively.