SDHI Fungicides. An Important Step in Maintaining Control of Tan Spot and Septoria leaf blotch Diseases of Wheat
Abstract:
In this study, we propose a hypothesis for protecting wheat plants against foliar fungal infections during the early growth stages by treating seeds with fluxapyroxad which is a succinate dehydrogenase inhibitor (SDHI) class fun gicide. Fluxapyroxad (Systiva®) is known, from our previous studies, for its systemic action to protect crops from significant wheat pathogens, such as Pyrenophora tritici-repentis and Zymoseptoria tritici. This study investigates the persistence of Pyrenophora tritici-repentis, the causative agent of tan spot disease, as well as other pathogens like Stagonospora nodorum and Mycosphaerella graminicola found in infected crop residues. We emphasize spe cifically on the potential of using SDHI class fungicides, as seed treatments to reduce the severity of fungal leaf blotch diseases of wheat (Tan spot, Stagonospora nodorum blotch, and Septoria tritici blotch). Through visual assessments of leaf disease and UAV remote sensing data, our findings confirm the effectiveness of Systiva® seed treatments at a dosage of 1.25 cc per kg of seed. This treatment enhances plant growth and reduces disease pres sure during the critical early stages of wheat cultivation.
