In 2012, BASF introduced two new fungicides based on its newest active ingredient, Xemium fungicide. The Environmental Protection Agency granted full registration of Priaxor fungicide and Merivon fungicide.
Xemium, a next-generation fungicide in the carboxamide family, was discovered by researchers at BASF headquarters in Germany. Xemium is in the carboxamide class of chemistry. The high mobility of Xemium allows the product to systemically redistribute from the waxy layer of the leaf to areas of the leaf that are not directly sprayed, protecting the whole leaf and ensuring long-lasting and disease-stopping effects. Xemium blocks the respiratory Complex II, which disrupts the energy supply and biosynthesis of essential fungal building blocks, preventing new infections from developing. It is active on a wide range of life stages of the fungus, and affects multiple stages in the fungal life cycle. Activity on multiple stages allows for a wider window of application and greater flexibility in product use.
Priaxor provides disease protection and post-infection disease control from some of the toughest fungal diseases of crops commonly grown across the U.S. Soybeans, potatoes and tomatoes are three of the main crops. Studies show Priaxor controls powdery mildew and black mold in tomatoes, and early blight and black dot in potatoes. Priaxor is a 2:1 premix fungicide containing F500 — the same active ingredient as Headline fungicide — and Xemium fungicide, the new active ingredient.
Merivon is a different premix of F500 and Xemium (1:1) that provides disease protection in several pome and stone fruit crops, including apples, cherries and peaches. This fungicide targets annual diseases including scab in apples, powdery mildew and leaf spot in cherries, and blossom blight, shot hole and powdery mildew in peaches.