Since leafhopper populations on silage corn increase rapidly late in the season, early plantings are able to escape serious damage. Chemical control measures are svailable for areas where late plantings are necessary or lesirable. Leafhoppers have not been a pest every year.

Lorry L. Dunning, Staff Research Associate, Entomology Extension, Davis and Richard S. Nielsen, American Cyanamid Company, contributed extensively to the project. The authors appreciate the help of several summer assistants.