CORN Newsletter: 2005-06, March 22, 2005

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C.O.R.N Newsletter 2005-06
March 22, 2005 - April 4, 2005

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Soybean Rust Update for March 21
by Anne Dorrance


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Much activity the past few weeks – so I will break it down by bullet point.

1. Soybean Rust has been removed from the list of select agents. This is a key move to help manage this disease. For those that were not aware, 9 plant pathogens were placed on list of select agents, mainly those pathogens which could potentially be used a bioterrorism threats against US Agriculture. Since soybean rust has arrived here NATURALLY, as it was predicted – then there is no reason to have this still in place. How does this affect you as producers? It means that the FBI will not show up on your doorstep once it is found in Ohio. We still, however, must follow protocols for the first finds in a state to be submitted to Ohio’s C.Wayne Ellett Plant and Pest Diagnostic Clinic and there have always been restrictions in place regarding movement of plant pathogens across state lines. Anyone can send samples to the clinic for diagnosis – because the clinics have the permits to accept these samples and a protocol to handle and diagnose. How does this affect me as an OSU researcher? Once it is found in Ohio, and not until then, I can begin studying this plant pathogen and develop studies to determine the best means to manage this pathogen under Ohio’s environmental conditions.

2. More requests for Section 18s were submitted to EPA. The one that maybe the most pertinent to this coming season is for Headline SBR and Headline STAR. The active ingredients are tebuconazole (Folicur) and Pyraclostrobin (Headline). If approved by EPA, they will be sold as a co-pack mixture or premix. Headline alone already has Section 3 labeling and Folicur recently received Section 18 approval. We will keep you posted on when EPA approves this for Ohio.

3. Lot’s of confusion over 2 or 3 applications for the materials that have been given Section 18 approval. To date, EPA has only approved 2 total applications per season of section 18 products for the growing season, with the exception of Domark, which can only be used once. We have applied for 3, but as of today (March 21) this has not been approved. Also, just to correct some rumors out there. This means 2 applications, it does not matter whether you apply at the low rate or high rate; it is for 2 applications total. For rust diseases, outstanding coverage and the high rates are required for best management of these diseases.

4. USDA has launched their soybean rust website http://www.usda.gov/soybeanrust/. This site will have more links and information on soybean rust throughout the growing season. Under the section labeled on the first page – follow the link to SBR in the United States. This is where you will be able to find information on the distribution and severity of soybean rust in the different states. Click on the state of Ohio; you will get specific information on Ohio’s sentinel plot system and fungicide guidelines for the state after soybeans have been planted and are up and growing!

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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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