pnut pnut Peanut Science 0095-3679 0095-3679 American Peanut Research and Education Society 10.3146/i0095-3679-28-1-2 Articles Response of Peanut Cultivars to Full and Reduced Spray Programs of Tebuconazole for Control of Southern Stem Rot1 B. A. Besler 2, *, W. J. Grichar 2, O. D. Smith 1, and A. J. Jaks 2 Res. Asso. and Res. Scien., Texas Agric. Exp. Sta., Yoakum, TX 77995; Prof., Texas A&M Univ., College Station, TX 77843; and Res. Asso., Texas Agric. Exp. Sta., Yoakum, TX 77995, respectively *Corresponding author (email: b_besler@tamu.edu).

1Contribution from the Texas Agric. Exp. Sta., Texas A&M Univ., College Station, TA No. 30526. 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 production 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.

 1 2001 28 1 5 8 American Peanut Research and Education Society 2001 American Peanut Research and Education Society Abstract

Eleven commercially grown peanut cultivars were evaluated for disease and yield response to two and four applications of tebuconazole under moderate disease pressure (< 12 hits/12.2 m) by southern stem rot (Sclerotium rolfsii). The incidence of southern stem rot was reduced in all cultivars when treated with two and four sprays of tebuconazole. Tamrun 96 and Southwest Runner had the lowest disease incidence. Cultivars responded with higher yields when sprayed with two and four applications of tebuconazole compared to the unsprayed plots. Peanut grade (SMK + SS) was not affected by tebuconazole. Georgia Runner and Tamrun 96 produced the highest grade while Southwest Runner was the lowest.

 Key Words Disease incidence; , Sclerotium rolfsii.