Syngenta Crop Protection has received a Section 18 emergency exemption for the use of Quilt fungicide in soybeans to control Asian soybean rust (Phakospora pachyrhizi) in 21 more states, following the first such exemption the EPA granted for Minnesota in late March.
The states include Colorado, Delaware, Florida, Georgia, Iowa, Illinois, Kentucky, Maryland, Minnesota, Missouri, Mississippi, North Carolina, Nebraska, North Dakota, New Jersey, New York, Ohio, Oklahoma, South Dakota, Texas, Wisconsin and West Virginia.
Quilt — a combination of azoxystrobin and propiconazole, the active ingredients in Quadris and Tilt fungicides — teams preventive and curative activity by pairing two trusted fungicides. Similar combinations have become very popular in Brazil as an effective tool for managing soybean rust, noted Marty Wiglesworth, soybean rust technical manager for Syngenta Crop Protection.
“Azoxystrobin is a strobilurin fungicide that provides preventive activity against soybean rust and a broad spectrum of other yield-reducing diseases; propiconazole, a triazole fungicide, is a powerful curative,” Wiglesworth explained. “Propiconazole moves rapidly into the leaf while azoxystrobin is absorbed over time. That gives us a continuous supply of fungicide protection. With soybean rust, which can defoliate a field in as little as a week after the outbreak starts, we want to go after the pathogen with both barrels.”
Quilt offers 14 to 21 days of residual activity, said Wiglesworth. Depending on the timing and severity of the disease outbreak, growers may need to make a followup application, he said. In areas where Quilt has not yet received a Section 18 registration, Wiglesworth said growers can tank-mix equal amounts of Tilt and Quadris to achieve the same curative/preventive effect.
Ag retailers and Syngenta representatives in states where Quilt has received Section 18 emergency exemptions have details on rates and timing.
More information on products for control of soybean rust can be found on www.soybeanrust.com. The site also features an array of management tools, informative articles, and the chance to communicate directly with plant pathologists about the disease.
“What is important to remember is that soybean rust can be managed successfully, which Brazil proved last year by producing its biggest soybean crop ever during a severe outbreak of the disease,” Wiglesworth added.
“Timeliness, good management and good tools make it possible — and having Quilt in the arsenal is a big part of that.”