College of Agriculture & Natural Resources
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|Cass County | |
|Cass County Extension |P: 269-445-4438 |E-mail: msue14@msu.edu |
|120 N. Broadway, Suite 209 Cassopolis, MI 49031 |F: 269-445-4418 |Web: msue.msu.edu/Cass |
| |January 2006 |
|Local field research offers growers soybean rust detection, spray options |MSU Extension educators in Cass, Van Buren and St. Joseph counties also worked|
| |with the Michigan Soybean Promotion Committee (MSPC) to evaluate the |
|Southwest Michigan soybean growers have feared the thought of Asian soybean rust |effectiveness of different fungicide applications for controlling SBR. |
|(SBR) entering their fields since the fungal disease it was first detected in the| |
|gulf states in 2004. |With the help of Cassopolis farmers Carl and Lee Sparks, an experiment was |
| |designed to evaluate two classes of fungicides (protectant and curative) |
|SBR brings with it a horrid history of crop loss as high as 80 percent and |sprayed at three different stages of soybean development and planted in three |
|significant loss of income for growers. In addition, growers were not familiar |different row spacings. |
|with foliar spraying soybeans to fend off this disease. | |
| |The study’s goal was to measure spray penetration into the soybean canopy and |
|Because of its proximity along the state’s southern border, Cass County became |how row spacing and plant maturity would affect it. SBR develops beneath the |
|part of an SBR monitoring program implemented by the United States Department of |plant canopy where moisture and temperature are higher, so an effective spray |
|Agriculture, MSU Extension and the Michigan Department of Agriculture. The |program needs to penetrate the plant canopy. |
|program called for intensive scouting in selected fields to detect SBR before it | |
|caused major economic loss. |The 2005 data, along with data from similar experiments throughout the state, |
| |are providing MSU Extension educators with information that can help growers. |
|Two fields were scouted every week from soybean plant emergence through maturity.| |
|Scouting reports were provided every week to the participating growers and an MSU| |
|campus coordinator, who tabulated data for more than 30 monitored sites |(Continued) |
|statewide. No SBR infections were detected and growers completed the growing | |
|season without further concern. | |
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|[pic] |Michigan State University Extension helps people improve their lives through an educational process |[pic] |
| |that applies knowledge to critical issues, needs and opportunities. Offices in counties across the | |
| |state link the research of the land-grant university, MSU, to challenges facing communities. | |
| |Citizens serving on county Extension councils regularly help select focus areas for programming. | |
| |MSU Extension is funded jointly by county boards of commissioners, the state through Michigan State | |
| |University and federally through the US Department of Agriculture. | |
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|Spray nozzle selection, nozzle angle, spray pressure, the plant’s growth stage |More than 40 growers attended these sessions. They commented that they |
|and row spacing all affect a fungicide’s ability to penetrate the soybean canopy.|received important information about aphid population rates, effectiveness of |
| |various insecticides and the importance of waiting for aphids to reach |
| |threshold levels before spraying. |
|Researchers were unable to evaluate the fungicide’s effectiveness at controlling | |
|SBR because the disease was not present, though they did notice that there was no|Several growers had sprayed at the first sight of aphids and were concerned |
|significant decrease or increase in soybean yield as a result of using these |that they would have to repeat this costly process. |
|fungicides. | |
| |Growers were pleased to hear directly from the researcher and felt they could |
|Additional recommendations will come as MSU research and Extension staff members |better manage soybean aphids after attending this meeting. |
|continue researching SBR control options. | |
| |Contact: Dan Rajzer, County Extension Director |
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|MSU researcher helps growers | |
|understand, manage soybean aphids |Cass County MSU Extension Staff |
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|Prior to last spring’s planting, soybean aphids were predicted to reach high |County Extension Director |
|numbers, potentially causing yield reductions. Growers were concerned and needed |Dan Rajzer |
|the latest information on scouting and management. | |
| |Extension Educator Consumer Sciences |
|MSU Extension educators in Cass, Berrien and Van Buren counties brought |Cindy Warren |
|researchers and growers together to share their knowledge and experiences. | |
| |Extension Educator Pork AoE |
|Growers were invited to two locations where they could meet with MSU entomologist|Beth Franz |
|Chris DiFonzo to ask questions and share information on soybean aphid | |
|development, scouting and control options. |Extension Educator Youth Development |
| |Betty Jo Nash |
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| |Food Nutrition Program Associate |
| |Linda Gunther |
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| |Building Strong Families Program Associate |
| |Nora Lee |
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| |Support Staff |
| |Patty Dohm |
| |Mary Wilkinson |
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|MSU is an affirmative-action, equal opportunity institution, Michigan State University Extension programs and materials are open to all without regard to race, |
|color, national origin, gender, religion, age, disability, political beliefs, sexual orientation, marital status, or family status. Issued in furtherance of |
|MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture, Thomas G. Coon, Extension Director, Michigan State |
|University, E. Lansing, MI 48824 |
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