For a period of some twenty years, white grubs (Phyllophaga spp.) of brood A have been appearing each third year in numbers to do serious damage throughout northeastern Iowa. In 1921 their range was extended to include the east one-third of the southern half of the state as previously shown. Their damage that year was severe throughout much of the newly invaded territory.
Proceedings of the Iowa Academy of Science
©1925 Iowa Academy of Science, Inc.
Jaques, H. E.
"The 1924 Outbreak of Brood A of White Grubs in Iowa,"
Proceedings of the Iowa Academy of Science, 32(1), 423-424.
Available at: https://scholarworks.uni.edu/pias/vol32/iss1/108