pnut pnut Peanut Science 0095-3679 0095-3679 American Peanut Research and Education Society 10.3146/pnut.12.1.0002 10.3146/i0095-3679-12-1-2 Articles Potential for Improved Control of Southern Stem Rot of Peanut with Resistance and Fungicides1 B. B. Shew , M. K. Beute , and J. E. Bailey 2 Former Research Assistant, Professor, and Assistant Professor, Department of Plant Pathology, North Carolina State University, Box 7616, Raleigh, NC 27695–7616

1Paper No. 8871 of the Journal Series of the North Carolina Agricultural Research Service, Raleigh 27695.

The use of trade names does not imply endorsment by the North Carolina Agricultural Research Service of the products named nor criticism of similar ones not mentioned.

Present title and address of senior author: Research Associate, Department of Crop Science, North Carolina State University, Box 7629, Raleigh, NC 27695–7629

 1 1985 12 1 4 7 20 2 1985 American Peanut Research and Education Society 1985 American Peanut Research and Education Society Abstract

Potential for improved control of southern stem rot caused by Sclerotium rolfsii Sacc.on peanut (Arachis hypogaea L.) was evaluated by combining moderate resistance with fungicide use. Various fungicides including carboxin, oxycarboxin, propiconazol, OAC 3890, and PCNB were applied to peanut lines NC 8C, NC Ac 18016, and Florigiant in North Carolina during 1980, 1981, and 1982. Consistently fewer disease loci occurred on NC Ac 18016 than on NC 8C or Florigiant. At least one fungicide reduced stem rot incidence in two of three years tested, but fungicide use did not result in greater yields. Effects of disease resistance and fungicides on suppression of stem rot development were additive.

 Key Words Stem rot; , Sclerotium rolfsii; , Arachis hypogaea; , groundnut; , fungicides; , disease resistance