The 1924 Outbreak of Brood A of White Grubs in Iowa

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