Dissipation of Fluopyram and Tebuconazole Residues in/on Pomegranate and Soil in Western Maharashtra

Abstract

Field and laboratory experiments were conducted to study the residues and dissipation of Fluopyram, a succinate dehydrogenase inhibitor (SDHI) and tebuconazole, demethylation inhibitor (DMI) used for the control of powdery mildew and Anthracnose diseases in grape. Residues of fluopyram dissipated with a half life of 4.04 and 5.18days, at recommended and double dose, respectively. For tebuconazole, the half life values recorded were 4.75 and 5.42days, respectively. The residues reached below quantification limit (BQL) on 10th and 15th day, in both the fungicides at recommended and double the recommended dose, respectively, which suggests a Pre-Harvest Interval (PHI) of 7.76 and 9.91days for fluopyram and tebuconazole, respectively when applied at 75g a.i./ha and 150g a.i./ha.