pnut pnut Peanut Science 0095-3679 0095-3679 American Peanut Research and Education Society 10.3146/i0095-3679-24-1-2 Reaction of Selected Peanut Varieties and Breeding Lines to Southern Stem Rot1 B. A. Besler *, W. James Grichar , and O. D. Smith 2 Res. Asst. and Res. Scient., respectively, Texas Agric. Exp. Stn., Yoakum, TX 77995 and Prof., Texas A&M Univ., College Station, TX 77843

1 Contribution of Manuscript TA No. 30526 from the Texas Agric. Exp. Stn., Texas A&M Univ., College Station. Mention of a trade mark or proprietary product does not constitute a guarantee or warranty of the product and does not imply its approval to the exclusion of other products that may be suitable. This publication was made possible through support provided by the Office of Agric., Bureau for Sci. and Tech., USAID, Grant No. DAN-4048-G-00-0041-00. Recommendations do not represent an official position or policy of USAID.

 *Corresponding author. 1 1997 24 1 6 9 American Peanut Research and Education Society 1997 American Peanut Research and Education Society Abstract

Eight Texas and one Georgia breeding lines, four accessions from Burkina Faso (West Africa), and six runner and two spanish-type cultivars were compared for yield, grade, and susceptibility to Sclerotium rolfsii Sacc. for 3 yr under irrigated field conditions. The spanish-type cultivar Tamspan 90 and runner-type breeding line TX896100 (recently released as Tamrun 96) consistently had the lowest disease incidence for all 3 yr. Averaged over years, TX896100 was the highest yielding entry. Four breeding lines resulted in a 2 to 16% yield increase over Okrun, the highest yielding cultivar. The African accessions, in general, produced low yields and low grades with no advantages in disease resistance.

 Key Words Cultivar; , Sclerotium rolfsii Sacc; , disease incidence; , southern blight; , white mold; , Arachis hypogea L