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A disease of the larvae of Japanese beetles and other scarab beetles that is caused by the bacterium Bacillus popilliae and turns the larvae a milky white color. Also called milky spore disease.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.