pnut pnut Peanut Science 0095-3679 0095-3679 American Peanut Research and Education Society 10.3146/i0095-3679-8-2-13 Articles Suppression of Peanut Stem Rot with the Insecticide Chlorpyrifos1,2,4 P. A. Backman and J. M. Hammond 3 Present Address, Ciba Geigy Corp, Greensboro, NC

1Journal article No. 6-810048 of the Alabama Agricultural Experiment Station.

2Botany, Plant Pathology, and Microbiology Dept., Auburn University, Agricultural Experiment Station, Auburn University, AL 36849.

4This study was funded in part by the Alabama Peanut Producers Association.

 7 1981 8 2 129 130 23 9 1981 American Peanut Research and Education Society 1981 American Peanut Research and Education Society Abstract

The insecticide chlorpyrifos is registered for use in peanuts for control of stem and foliage feeding insects. Field research showed that insecticidal use rates also reduced stem rot in peanuts caused by Sclerotium rolfsii Sacc. as effectively as registered fungicides. Laboratory studies indicated a synergism between the active and the inert ingredients of the emulsifiable concentrate formulation (LorsbanR4EC) in suppression of S. rolfsii.

 Key Words Arachis hypogaea; , groundnut; , Southern blight; , white mold; , nontarget effects