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Milky disease was discovered in New Jersey in 1933.

When ingested by a foraging beetle grub they multiply prodigiously in its blood, causing it to turn an abnormally white color, hence the popular name, “milky disease.”

The first conclusive proof that an insect could be brought under control by introducing a disease into its environment came in the late 1930’s with the discovery and use of milky disease for the Japanese beetle, which is caused by the spores of a bacterium belonging to the genus Bacillus.

On the other hand, those who are willing to wait an extra season or two for full results will turn to milky disease; they will be rewarded with lasting control that becomes more, rather than less effective with the passage of time.

An extensive program of research is under way in the United States Department of Agriculture laboratory at Peoria, Illinois, to find a way to culture the organism of milky disease on an artificial medium.