Evaluation of Captan as a Seed Treatment for Corn. W. L. Pedersen, Assistant Professor, Department of Plant Pathology, University of Illinois at Urbana-Champaign, Urbana 61801. J. M. Perkins, Assistant Plant Pathologist, and D. G. White, Associate Professor, Department of Plant Pathology, University of Illinois at Urbana-Champaign, Urbana 61801. Plant Dis. 70:45-49. Accepted for publication 17 June 1985. Copyright 1986 The American Phytopathological Society. DOI: 10.1094/PD-70-45.

A 10.2% increase in plant stand and a 9.9% increase in grain yield were observed for plots planted with captan-treated corn (Zea mays) seed over plots planted with talc-treated seed tested at 37 locations with 15 hybrids in 1981. At only five locations, the differences between captan and talc seed treatments were not significant (P = 0.05) for either plant stand or grain yield. Planting dates, planting densities, hybrids, and seed treatments were significant (P = 0.01) for plant stand and grain yield at Urbana and Dekalb in 1981 and 1982. The planting data × seed treatment interaction was highly significant at Dekalb in 1981 and at Urbana in 1982. In both years, captan seed treatment increased plant stands and grain yields for the early planting date but not for the later planting date. This increase appeared to be related to soil temperature for the 10 days after planting.

Keyword(s): RPAR.