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BASF's Priaxor D Fungicide Receives EPA Registration

Farmers have a new management tool for frogeye leaf spot. BASF announced that Priaxor D fungicide received federal Environmental Protection Agency (EPA) registration.

Priaxor D contains three modes of action to help manage strobilurin-resistant frogeye leaf spot in soybeans. The fungicide is a combination of F500 and Xemium fungicide, the same active ingredients as in Priaxor fungicide, combined with tetraconazole.

Priaxor D fungicide will be an option for growers in states experiencing high levels of strobilurin-resistant frogeye leaf spot, including Arkansas, Kentucky, Louisiana, Mississippi, and Tennessee, according to a company report.

“Strobilurin-resistant frogeye leaf spot is a major concern for growers, specifically in the Mid-South,” said Megan Andriankaja, technical market specialist with BASF. “We are excited to introduce Priaxor D fungicide, the first three mode of action fungicide for soybean growers. Priaxor D fungicide will control a wide array of diseases, including strobilurin-resistant frogeye leaf spot.”

In Mid-South field trials, soybean acres treated with Priaxor D fungicide had a 1.8 severity of strobilurin-resistant frogeye leaf spot on a 10-point scale. Acres treated with Priaxor fungicide alone experienced a 3.5 disease severity. The untreated check experienced 7.0 disease severity, demonstrating the need to use an effective triazole to control strobilurin-resistant frogeye leaf spot.

Manage strobilurin-resistant frogeye leaf spot with an integrated management approach.

“The first step to managing strobilurin-resistant frogeye leaf spot is to plant a soybean variety that is resistant to the disease,” said Andriankaja. “When resistant soybean varieties are planted in low-risk areas of resistance, BASF recommends a proactive application of Priaxor fungicide. In addition to controlling frogeye leaf spot, Priaxor fungicide controls other diseases, including Septoria brown spot, anthracnose, and aerial web blight.”

State registrations for Priaxor D fungicide are expected in time for the 2015 growing season.

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