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C.O.R.N Newsletter 2009-30
     September 8, 2009 - September 14, 2009


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Late Bean Leaf Beetle Populations in Soybean
by Ron Hammond, Andy Michel, Bruce Eisley

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We thought it important enough to again remind growers about late season pod feeding by bean leaf beetles. Although we have not received that many reports of the insect rising to high numbers this summer, nevertheless, growers should continue monitoring soybean fields that remain green and succulent throughout September. Adult beetles that emerge from yellowing soybean fields will move to those that are still green to continue feeding prior to over wintering. This movement might result in abnormally high densities in some late maturing fields. Injury to the pod is the primary concern because of potential yield and seed quality losses, especially with food grade soybeans and those being grown for seed, both situations where seed quality is an issue. If populations are high, beetles are still active and continuing to feed, and pod injury has reached 10-15% and is relatively new feeding, treatment is warranted to prevent further pod damage. Growers should be very careful with their insecticide choice because of the shorter time period from application to harvest. See the following web site, http://entomology.osu.edu/ag/images/siblb.pdf for a list of labeled pesticides along with their pre-harvest intervals.

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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