Native to eastern Asia, the Japanese beetle was accidentally introduced to the United States in 1916. The problems caused by the presence of adult Japanese beetles are that they undermine plant foliage and feed on the fruit of many plant species.
Frequently asked questions
- How to recognize the Japanese beetle?
- This beetle has brilliant metallic colors. The head and thorax are usually green, and the elytra coppery brown. Five small tufts of white hair adorn each side of the abdomen.
- How to prevent and control Japanese beetle?
- From mid-July onwards, when females lay their eggs in the soil, spray plants or insects directly with insecticidal soap (water plus 10% dishwashing soap).
- Turn off lights in flowerbeds at night, as these insects are attracted by light.
- Practice grasscycling by leaving grass clippings in place after mowing, as this will hinder the deposition of female eggs on the ground.
- Plant alliums (chives) near your shrubs and plants, as this herb is a natural repellent.
- Remove weeds frequently, as they provide habitat for adult beetles.
Further information