Bacillus popilliae

bacterium

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Last updated

June 17, 2026

Quick Summary

Bacillus popilliae is a bacterium known for causing "milky disease" in the larvae of the Japanese beetle (Popillia japonica). This bacterium is used as a biological control agent to manage Japanese beetle infestations.1

Bacillus is a genus of rod-shaped bacteria commonly found in soil and water. These bacteria are known for their ability to form dormant spores that are resistant to heat, chemicals, and sunlight, allowing them to survive for extended periods. While many Bacillus species are harmless, some can cause issues like food spoilage or illness. For instance, B. anthracis causes anthrax, and B. thuringiensis produces a toxin effective against insects. Some Bacillus species are also sources of medically useful antibiotics.2

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Japanese beetle
…control is a disease-inducing bacterium, Bacillus popilliae, which causes milky disease in larvae; its use has reduced Japanese beetle infestations in some areas.
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…control is a disease-inducing bacterium, Bacillus popilliae, which causes milky disease in larvae; its use has reduced Japanese beetle infestations in some areas.
Read More