Managing the Japanese Beetle: A Homeowner’s Handbook
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The Japanese beetle (Popillia japonica Newman) is a highly destructive plant pest of foreign origin. It was first found in the United States in a nursery in southern New Jersey in 1916. In its native Japan, where the beetle’s natural enemies keep its populations in check, this insect is not a serious plant pest.
In the United States, however, the beetle entered without its natural enemies and found a favorable climate and an abundant food supply. By 1972, beetle infestations had been reported in 22 States east of the Mississippi River and also in Arkansas, Iowa, and Missouri. Since then, the pest has spread to Southern and Western States, but tough regulations and careful monitoring have prevented its establishment there. Without its natural checks and balances, the Japanese beetle has become a serious plant pest and a threat to American agriculture.
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This map shows the distribution of Japanese beetles in the United States as of January 2015.
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