Growers looking at any of the major disease control products for the soybean market will find something interesting in 2014 — most are combinations with two active ingredients. The strobilurin class of fungicides is the foundation of most soybean disease control programs, but for 2014, each version will often be packaged with another active ingredient.

This resistance-management strategy makes sense, especially since cases of resistant disease have already been discovered in some locations. For example, frogeye leaf spot resistance has been found in some parts of the country, which means those familiar names like Quadris, Stratego and Headline more than likely carry an add-on. Quadris becomes Quilt Xcel, Stratego becomes Stratego YLD, and Headline becomes Headline AMP.

Each of those strobilurins carries a triazole with it to prevent resistance and heat up its disease control action. DuPont’s Aproach fungicide, introduced in 2013, will add Aproach Prima to the portfolio in 2014, if regulators approve. This premix includes a triazole as well.

And there’s a new soybean fungicide that rolled out in 2013 — Priaxor — that includes a strobilurin combined with another active ingredient, Xemium. This is a carboxamide, which is a new mode of action for the soybean market and another enhancement
in the move to prevent disease resistance in the disease control business.

As you select your soybean disease control program for 2014, consider the active ingredients you’re choosing and make sure you’re hitting the crop with two modes of action. It’s an investment today to prevent resistance in the future.