ASSESSMENT OF EARLY EMERGENT FUNGICIDE APPLICATIONS FOR IMPROVED WHITE MOLD CONTROL IN PEANUTS
Applied Research
Mark Crosby
County Extension Coordinator
University of Georgia
Swainsboro
Abstract
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\r\n Management of soilborne diseases in peanuts is a major challenge for producers across Southeast Georgia. Management strategies vary based on variety, rotation, crop and environmental conditions and Rx disease programs. Fungicide programs targeting the suppression of Southern stem rot are typically initiated 60 days after planting following the current recommendation of the University of Georgia. Extremely hot soil temperatures in May of 2010 required reexamination of the soilborne disease management strategy. Georgia 06-G peanuts were planted on May 16 that the Southeast Georgia Research and Education Center (SEREC) in Midville, Georgia. Using randomized, complete block design with 4 replications, a research protocol was established to evaluate soilborne fungicides applied at 30 and/or 45 days after planting verses the traditional 60 day window. Chemistries tested included Tebuconazole, Chlorothalonil, Prothioconizole, and Pyraclostrobin. Plots were sprayed using a tractor mounted sprayer that covered 4 rows. Plots were 4 rows wide by 40 feet long. At 60 and 90 days after planting all plots (except the untreated check) were sprayed with 18.5 ounces of Abound. Two applications of Bravo completed the fungicide program.Peanuts were inverted on October 12th and roots and pods were evaluated to determine the number of hits per 80 foot of row. The center 2 rows were harvested, bagged and weighed on October 26th. Data showed significant yield increase on treatments 1 which had Tebuconazole applied at 45 DAP. Teatment 4, which also had Tebuconazole applied at 45 DAP, was statistically significant, yet it showed an 800 pound yield increase.
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Poster has NOT been presented at any previous NACAA AM/PIC
This poster is being submitted for judging. It will be displayed at the AM/PIC if not selected as a State winner. The abstract will be published in the proceedings.
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Authors: P.M. Crosby
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Crosby, P. Emanuel County Extension Coordinator, University of Georgia, Georgia, 30401