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C.O.R.N Newsletter 2009-31
     September 15, 2009 - September 21, 2009


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Soybean Rust Find in Kentucky – One pustule in one lesion on one leaf out of 100
by Anne Dorrance

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Soybean rust has made it to both Tennessee and Kentucky last week as two additional counties were turned red last week on the national soybean rust map. Both finds are the first for this year in those states and these finds were at the barely detectable stages (one leaf out of 100 leaves with only 1 to few lesions with only 1 pustule, see http://sbr.ipmpipe.org/cgi-bin/sbr/public.cgi. Soybean rust is an invasive species that was first found in the US in 2004 but has not been found on soybeans in Ohio. Soybean rust has overwintered the past few years in Florida, Alabama, and Louisiana on kudzu but has not made it to Ohio in any of the previous years. These low levels found this year in Tennessee and Kentucky are earlier than years previous but still make it questionable whether or not it will make it to Ohio in time to be found. There is no risk to our crop at the current growth stages across all planting dates. In addition, much of the crop is already turning yellow. Scouting activities will continue to monitor for the presence of rust until the crop has lost all of its leaves.

Readers can subscribe electronically to this newsletter by signing up at http://agcrops.osu.edu/services/email.html. E-mail labarge.1@osu.edu if you have problems subscribing or no longer wish to receive this newsletter.

C.O.R.N. is a summary of crop observations, related information, and appropriate recommendations for Ohio Crop Producers and Industry. C.O.R.N. is produced by the Ohio State University Extension Agronomy Team, State Specialists at The Ohio State University and Ohio Agricultural Research and Development Center. C.O.R.N. Questions are directed to State Specialists, Extension Associates, and Agents associated with Ohio State University Extension and the Ohio Agricultural Research and Development Center at The Ohio State University.


Information presented above and where trade names are used, they are supplied with the understanding that no discrimination is intended and no endorsement by Ohio State University Extension is implied. Although every attempt is made to produce information that is complete, timely, and accurate, the pesticide user bears responsibility of consulting the pesticide label and adhering to those directions.

All educational programs conducted by Ohio State University Extension are available to clientele on a nondiscriminatory basis without regard to race, color, creed, religion, sexual orientation, national origin, gender, age, disability or Vietnam-era veteran status.

Issued in furtherance of Cooperative Extension work, Acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture, Keith L. Smith, Director, Ohio State University Extension.

TDD # 1 (800) 589-8292 (Ohio only) or (614) 292-1868

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