title: Residue dynamics of fenamidone and mancozeb on gherkin under two agro climatic zones in the state of Karnataka, India.
abstract: Residue dynamics of fenamidone and mancozeb on gherkin was evaluated at two different agro climatic zones i.e. at Bangalore (Zone-1) and Dharwad (Zone-2) in the state of Karnataka, India. Two treatments of the combination formulation (fenamidone 10% + mancozeb 50%) were given at the standard dose 150 + 750 g a.i. ha(-1) and double dose 300 + 1,500 g a.i. ha(-1). Initial residue deposits of fenamidone were 0.467 and 0.474 mg kg(-1) at Zone-1 and 2, respectively from standard dose treatment. From double dose treatment they were 0.964 and 0.856 mg kg(-1), respectively. Fenamidone residues persisted for 15 and 10 days and dissipated with the half-life of 4 and 3 days at Zone-1 and 2, respectively. Mancozeb residue deposits on gherkin were 0.383 and 0.428 mg kg(-1) from standard dose and 0.727 and 0.626 mg kg(-1) from double dose treatment at Zone-1 and 2, respectively. Mancozeb residues dissipated with the half-life of 2 and 1 day, respectively. Residues of both fenamidone and mancozeb dissipated faster at Zone-2 compared to Zone-1. The limit of quantification of fenamidone and mancozeb were 0.02 and 0.1 mg kg(-1), respectively in both gherkin and soil. Residues of fenamidone and mancozeb in soil collected on the 20th day from the 2 locations were found to be below quantifiable limit of both fungicides.
authors.affiliation: Pesticide Residue Laboratory, Indian Institute of Horticultural Research, Hessaraghatta Lake, P.O. Bangalore, Karnataka, 560 089, India. soudamini_mohapatra@rediffmail.com
authors.forename: Soudamini
authors.initials: S
authors.lastname: Mohapatra
authors.forename: M
authors.initials: M
authors.lastname: Deepa
mesh_terms: D002980:Climate; D018553:Cucumis sativus / Q000737:chemistry*; D004784:Environmental Monitoring; D005659:Fungicides, Industrial / Q000032:analysis / Q000737:chemistry*; D048288:Imidazolines / Q000032:analysis / Q000737:chemistry*; D007194:India; D008344:Maneb / Q000032:analysis / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis / Q000737:chemistry*; D000073739:Strobilurins; D015038:Zineb / Q000032:analysis / Q000737:chemistry*
chemical_list: D005659:Fungicides, Industrial; D048288:Imidazolines; D010573:Pesticide Residues; D000073739:Strobilurins; D008344:Maneb; C540355:fenamidone; C013099:mancozeb; D015038:Zineb