A Decision Model for Use of Fumigation and Resistance to Control Cylindrocladium Black Rot of Peanuts. J. E. Bailey, Assistant Professor, Department of Plant Pathology, North Carolina State University, Raleigh 27612. C. A. Matyac, Research Associate, Department of Plant Pathology, North Carolina State University, Raleigh 27612. Plant Dis. 73:323-326. Accepted for publication 31 October 1988. Copyright 1989 The American Phytopathological Society. DOI: 10.1094/PD-73-0323.

Expected yields of resistant peanuts in fumigated (treated with metham-sodium) and nonfumigated fields were calculated from yield and disease incidence in a susceptible cultivar in the same field. Calculations were based on known relationships between disease incidence and yield loss of resistant and susceptible cultivars. The dollar-value increase expected from the use of a resistant cultivar with or without soil fumigation was then compared with that expected from the use of a susceptible cultivar without soil fumigation. The utility of the model as a means of selecting the most cost-effective control measure is discussed.

Keyword(s): Arachis hypogaea, CBR, Cylindrocladium crotalariae, economics, genetic resistance.