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Efficacy of Iprodione for Control of Storage Fungi in Corn. J. TOMAN,JR, Postdoctoral Research Associate Department of Plant Pathology, University of Illinois, Urbana 61801. D. G. WHITE, Associate Professor, Department of Plant Pathology, University of Illinois, Urbana 61801. Plant Dis. 78:27-33. Accepted for publication 18 August 1993. Copyright 1994 The American Phytopathological Society. DOI: 10.1094/PD-78-0027.

Three experiments were done to determine the efficacy of the fungicide iprodione (Rovral 50WP, Rhone-Poulenc Ag Company) for control of storage fungi. In 1986, corn (B73 X LH38) harvested at an average of 20.8% moisture was treated with 0, 5, 10, and 20 ?g/g (a.i. fungicide/ grain weight adjusted to 15% grain moisture); and the experiment was repeated in 1987 at an average harvest moisture of 19.9%. In 1987, an additional experiment was done with corn (Pioneer 3377) harvested at an average moisture of 25.6% and treated with iprodione at 0, 10, 20, and 40 ?g/g (a.i. fungicide/grain weight adjusted to 15% moisture). After treatment, the grain was augered into modified grain bins and dried using ambient air. The incidence of storage fungi was determined following plating of kernels on malt salt agar. Fungicide treatments reduced the incidence of Penicillium spp. and Aspergillus spp. when compared to the untreated control. The control of storage fungi resulted in fewer damaged kernels, as determined by a licensed federal grain inspector. Results suggest that low rates of a fungicide applied at harvest can be integrated with currently used control techniques, thus allowing for maintenance of quality grain

Keyword(s): low-temperature drying, maize, Zea mays