INITIATION OF FUNGICIDES FOR CONTROL OF ASIAN SOYBEAN RUST: A NEW PERSPECTIVE FROM JEFF DAVIS COUNTY
Extension Education
Tim Varnedore
Baxley
Abstract
\r\n Since 2004, considerable research and Extension efforts have been expended in developing strategies to provide early detection of Asian soybean rust (ASR), Phakopsora pachyrizi, and to monitor the spread of this disease in Georgia and across the soybean production regions of the country. A network of sentinel plots planted to three maturity groups of soybeans or defined from native stands of kudzu, have been established annually since 2005. On a weekly basis; 50 leaves per plot were collected and brought to the diagnostic laboratory for assessment. Diagnostic results were made available to the public at www.sbrusa.net. Based upon early detection of ASR from sentinel plots, recommendations for timely, cost-effective fungicide applications had been utilized by Georgia soybean producers. Prior to September of the 2009 production season, ASR had not been detected in Georgia’s sentinel plots east of Interstate-75. Thus, growers were assured that fungicide applications were not needed. In early September, a producer in Jeff Davis County asked for assistance from the University of Georgia Cooperative Extension to diagnose extensive areas of disease in his soybean fields. The county agent determined that ASR was rampant in the fields, which had not been sprayed in accordance with Extension guidelines. However, a neighboring field that had been sprayed with fungicides was unaffected. As a result of this discovery by a county agent, and subsequent field days conducted for growers, recommendations for management of ASR in Georgia are no longer based solely on the use of sentinel plots.
\r\n
\r\n
\r\n
\r\n
\r\n
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.
Click to view Poster
Authors: T. Varnedore, R.C. Kemerait, J.R. Whitaker
-
Varnedore, T. County Extension Coordinator, University of Georgia, Georgia, 31539
-
Kemerait, R. Extension Pathologist, University of Georgia, Georgia, 31793
-
Whitaker, J. Extension Agronomist-Soybeans, University of Georgia, Georgia, 30460