Ratings of NR may mean that the fungal group listed is not a target of the specific fungicide active ingredient. Efficacy categories: E = Excellent VG = Very Good G = Good F = Fair P = Poor NR = Not Recommended NS = Not Specified on product label U = Unknown efficacy or insufficient data to rank product. Individuals using such products assume responsibility for their use in accordance with current directions of the manufacturer. Reference in this publication to any specific commercial product, process, or service, or the use of any trade, firm, or corporation name is for general informational purposes only and does not constitute an endorsement, recommendation, or certification of any kind by members of the group, or by the North Central Soybean Research Program. It is the applicator’s and users’ legal responsibility to read and follow all current label directions. This information is provided only as a guide. Read and follow all use restrictions before applying any fungicide to seed, or before handling any fungicide-treated seed. Many active ingredients and their products have specific use restrictions. Additional active ingredients may be available but have not been evaluated in a manner allowing a rating. It is not intended to be a list of all labeled active ingredients. The list includes ingredients in the most widely marketed products available as of the release date of the table. Each rating is based on the fungicide’s level of disease control, and does not necessarily reflect efficacy of fungicide active ingredient combinations and/or yield increases obtained from applying the active ingredient. Efficacy ratings for each fungicide active ingredient listed in the table were determined by field-testing the materials over multiple years and locations by the members of this group, and include ratings summarized from national fungicide trials published in Plant Disease Management Reports (and formerly Fungicide and Nematicide Tests) by the American Phytopathological Society at. *The members of North Central Regional Committee on Soybean Diseases (NCERA-137) have developed the following ratings for how well fungicide seed treatments control seedling diseases of soybeans in the United States. Efficacy of seed-applied fungicides for control of soybean seedling diseases* Fungicide active ingredient Good data from other parts of the United States, however, indicate that foliar fungicide application to a soybean seed crop (where environmental conditions and local disease pressure warrant it) can substantially increase seed vigor and germinability and can reduce the carryover of inoculum of seedborne diseases such as pod and stem blight and anthracnose. While each of the diseases listed occurs in the state, the data on the relationships between disease severity, yield loss, and economic return are not sufficient to base a recommendation for fungicide application to soybeans in New York. The efficacy of these products for soybean disease control based on appropriate application timing and labeled rates is listed in Table 6.5.2 as a convenience for New York soybean producers. Several fungicide products are registered for use on soybeans by foliar application. Remember to read and follow pesticide labels carefully. Planting of bin-run seed is discouraged, though planter box application of fungicide can be made by the grower at the time of seeding. Fungicide treatment is especially needed when seeds are planted into cold wet soils or where there is a field history of damping-off or Phytophthora root rot. Treatment of seed with protectant fungicides, professionally applied by the seed supplier, is recommended for all soybean seed planted in New York - with the exception of organic production. Disease Management Fungicidal Seed Treatment Although there is little research information on which to base chemical disease control guidelines in New York, the following information on fungicides is included as a service to New York growers who may wish to apply fungicides. Diseases generally are kept in check by the use of sound agronomic practices such as crop rotation and the selection of soybean varieties with resistance to diseases known to be a problem in the local area. Little is known, however, about the incidence, severity, or yield effects of diseases in the state. Several diseases, including Phytophthora root and stem rot, pod and stem blight, frogeye leaf spot, brown spot, downy mildew, Cercopsora leaf blight and purple seed stain, and Sclerotinia stem rot (white mold), are known to affect soybeans in New York.
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