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C.O.R.N Newsletter 2009-32
     September 21, 2009 - September 28, 2009


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Harvest Planning – When to Harvest Those Problem Fields
by Anne Dorrance

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We have a number of fields that have high levels of Sclerotinia stem rot, SDS and SCN this year. Each of these diseases is readily spread with soil or trash that moves on equipment. This is especially true of the sclerotia formed by the Sclerotinia fungus in fields with Sclerotinia stem rot. The hard black irregular shaped sclerotia will form both inside and outside of the stem. Combines are great machines and can be especially efficient at moving things around. So as I see it, there are two choices in prioritizing which field to harvest first. A) Harvest problem fields first, they are maturing early, and then clean the combine before moving to good fields. B) Alternatively, these problem fields could be harvested last and then clean the combine one time before storing. The caveat with this – especially for those areas that received substantial rains during the season, is that Phomopsis can also be a problem. Phomopsis seed rot has been a problem in a few areas of the state where substantial rains persist through the maturation process (seed filling growth stages) and on susceptible varieties. If the seed becomes subjected to repeated rainfall events, this increases the likelihood that Phomopsis can then add to the problems. You’ve got to weigh the different options for your own operation, but by all means have a safe harvest.

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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