Abstract
During the season of 1959–60 at Belle Glade, Florida, DDT and parathion emulsion sprays were tested to determine the number of applications required to control the corn stem weevil ( Hyperodes humilis (Gyllenhal)) and the fall armyworm ( Laphygma frugiperda (J. E. Smith)) on young sweet corn. Populations of these insects were decreased significantly and yields of U. S. Fancy and total marketable ears were increased significantly by six applications of DDT or of parathion when applied on the day of seedling emergence and at 4-day intervals thereafter. An application of DDT at planting time preceding the post-emergence DDT sprays resulted in slightly greater infestations by the stem weevil and significantly lower yields. Postemergence DDT treatments resulted in significantly greater stands than in the untreated cheek in a test in which the corn stem weevil was the major pest.
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