Dissipation of cypermethrin, chlorpyriphos, and profenofos in tomato fruits and soil following application of pre-mix formulations.
Persistence of cypermethrin, chlorpyriphos, and profenofos in tomato and soil were studied following application of two pre-mix formulations of insecticides viz. Roket 44EC (profenofos 40% + cypermethrin 5%) and Action-505EC (chlorpyriphos 50% + cypermethrin 5%) at recommended (0.8-1.0 L ha(-1)) and double dosage (1.6-2.0 L ha(-1)). In all the treatments residues persisted beyond 7 days in tomato fruits. Half-life values were calculated from first-order dissipation kinetics. In the case of Roket 44EC, residues of cypermethrin on fruits dissipated with half-life of 2.0-3.6 days, whereas residues of profenophos dissipated with the half-life of 2.2-5.4 days. In the case of Action-505EC, residues of chlorpyriphos and cypermethrin dissipated from fruits with the half-life values of 2.9-3.3 and 2.5-4.8 days, respectively. In soil, residues of profenofos persisted for 7-15 days, whereas residues of chlorpyrophos and cypermethrin persisted for 0-7 days only.
Gupta
Suman
S
Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi, 110012, India. drsumangupta2002@yahoo.com
Gajbhiye
Vijay T
VT
Sharma
Rakesh K
RK
Gupta
Ram K
RK
D004390:Chlorpyrifos / Q000737:chemistry*; D002849:Chromatography, Gas; D002853:Chromatography, Liquid; D006207:Half-Life; D007306:Insecticides / Q000737:chemistry*; D018551:Solanum lycopersicum / Q000737:chemistry*; D063086:Organothiophosphates / Q000737:chemistry*; D010573:Pesticide Residues / Q000737:chemistry*; D011722:Pyrethrins / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*
D007306:Insecticides; D063086:Organothiophosphates; D010573:Pesticide Residues; D011722:Pyrethrins; D012989:Soil Pollutants; C017160:cypermethrin; C024273:profenofos; D004390:Chlorpyrifos