title: Residue and bio-efficacy evaluation of controlled release formulations of metribuzin against weeds in wheat.
abstract: Controlled release formulations of metribuzin in polyvinyl chloride, (emulsion); carboxy methyl cellulose, CMC and carboxy methyl cellulose- kaolinite composite, CMC-KAO are reported. The MET-CMC-KAO-3 (T(9)) formulation provided a superior control (76.1%) of weeds in field grown wheat in comparison to metribuzin 75 DF (57.14%) at the dose (350 g a.i. ha(-1)) after 90 days of sowing. The treatment (T(9)) reduced the dry weight of the weed flora after 30 days of sowing (4.0 g m(-2)) and significantly superior over metribuzin 75 DF (6.0 g m(-2)) and control (17.72 g m(-2)). There were nil to negligible metribuzin residue in soil at harvest of wheat crop and were within prescribed limit of 10 mg L(-1) in drinking water (EPA).
authors.affiliation: Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi, 110 012, India. jitendrakumar7@yahoo.com
authors.forename: Jitendra
authors.initials: J
authors.lastname: Kumar
authors.forename: Keyath
authors.initials: K
authors.lastname: Nisar
authors.forename: N A
authors.initials: NA
authors.lastname: Shakil
authors.forename: Rajvir
authors.initials: R
authors.lastname: Sharma
mesh_terms: D000383:Agriculture; D003692:Delayed-Action Preparations; D006540:Herbicides / Q000032:analysis / Q000633:toxicity*; D010573:Pesticide Residues / Q000032:analysis*; D031783:Phalaris / Q000187:drug effects; D012989:Soil Pollutants / Q000032:analysis*; D014227:Triazines / Q000032:analysis / Q000633:toxicity*; D014908:Triticum / Q000737:chemistry*
chemical_list: D003692:Delayed-Action Preparations; D006540:Herbicides; D010573:Pesticide Residues; D012989:Soil Pollutants; D014227:Triazines; C009235:metribuzin