Japanese Beetles in full force

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Japanese Beetles have been in full force this year through the upper midwest. We have seen the nasty bugs thriving this summer in Wisconsin, Minnesota and Iowa. Here are the top five things you need to know about Japanese beetles:

  • They do not kill plants - for the most part. If you get significant defoliation year after year, a plant may suffer dieback
  • Don't use traps - they attract more beetles
  • Japanese beetles love to eat Linden trees, roses, willows and about 300 other plants
  • You can kill the beetles with insecticide to protect a single plant, but they are difficult to control overall.
  • Japanese beetles start out as white grubs in the soil, the next year's larvae can be controlled with a granular product applied the previous year.

Here are a couple of other resources.

http://minnesota.publicradio.org/display/web/2011/08/02/beetle/

http://www.wrn.com/2011/08/japanese-beetles-stay-for-another-month/

https://www.extension.iastate.edu/article/yard-and-garden-japanese-beetles

- Brad

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