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By: Flint, W. P. (Wesley Pillsbury), - Illinois. Natural History Survey DivisionEdition:Publication info: Urbana, Ill, Illinois Natural History Survey, 1919Volume: 6Series:Holding Institution: University Library, University of Illinois Urbana ChampaignSubjects: Corn Corn root-aphis Diseases and pestsBHL Collections:
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By: Webster, F. M. (Francis Marion), - United States. Bureau of Entomology. - United States. Department of Agriculture.Edition:Publication info: Washington, D.C, U.S. Dept. of Agriculture, Bureau of Entomology, 1907Volume: ser.2:no.86Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Agricultural pests Aphids Aphis Corn Corn root-aphis Diseases and pestsBHL Collections: