Metribuzin dissipation pattern in soil and its residue in soil and chilli

Field study was carried out to determine the dissipation of metribuzin and its residues in soil and chilli. Vermicompost (2 t/ha) was used as organic amendments to enhance the degradation. Metribuzin was applied at single and double the dose of 500 and 1000 g/ha. The chilli variety ‘Krishna Jolokia! was grown with a recommended practices. The recoveries obtained for untreated soil and chilli were in acceptable range of (80.6–85.7%) and (86.8–92.2%) of the metribuzin standards and spiked samples. The limit of detection (LOD)-0.003 μg/g and the limit of quantification (LOQ)-0.01μg/g in soil and chilli. The metribuzin residue level ranged 0.153–0.356 μg/g on the day of application of metribuzin and further degraded to 0.023–0.087 μg/g on the 21^st day of application. However, the half-life of metribuzin was observed to be 7 and 10 days with single and double the dose of application of metribuzin. Metribuzin residues did not persisted in soil beyond 30 days after application and in fruits.