Persistence of insecticides in ready-mix formulations and their efficacy against Lipaphis erysimi (Kalt) in cauliflower.
Persistence of cypermethrin, deltamethrin, profenofos, and triazophos in cauliflower curd was studied, following application of two premix formulations viz: Roket 44EC (profenofos 40 % + cypermethrin 4 %) and Anaconda Plus 36EC (triazophos 35 % + deltamethrin 1 %) at recommended (1.0 L ha(-1)) and double doses (2.0 L ha(-1)). In the case of Roket 44EC, residues of cypermethrin dissipated with the half-life values of 1.5-2.1 days, whereas residues of profenofos dissipated with the half-life of 2.9-3.3 days on cauliflower curd. In the case of Anaconda, residues of triazophos and deltamethrin dissipated from curd with the half-life values of 2.6-3.0 and 2.2-2.6 days, respectively. Both the combination mix significantly reduced the aphid population up to 14 days after spray and increased the yield by 155-160 % over control. Anaconda (2.0 L ha(-1)) treated plots yielded the highest number of marketable curds. Based on risk assessment analysis, safe waiting period of 3 and 5 days has been suggested for Roket 44EC and Anaconda Plus 36EC, respectively, in cauliflower at recommended dose of application.
Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi, 110012, India. drsumangupta2002@yahoo.com
Suman
S
Gupta
R K
RK
Sharma
V T
VT
Gajbhiye
R K
RK
Gupta
D000818:Animals; D001042:Aphids / Q000187:drug effects* / Q000502:physiology; D001937:Brassica / Q000737:chemistry*; D004784:Environmental Monitoring; D006207:Half-Life; D007306:Insecticides / Q000032:analysis* / Q000633:toxicity; D008956:Models, Chemical; D009570:Nitriles / Q000032:analysis / Q000633:toxicity; D063086:Organothiophosphates / Q000032:analysis / Q000633:toxicity; D010573:Pesticide Residues / Q000032:analysis / Q000633:toxicity; D011722:Pyrethrins / Q000032:analysis / Q000633:toxicity; D012989:Soil Pollutants / Q000032:analysis / Q000633:toxicity; D014230:Triazoles / Q000032:analysis / Q000633:toxicity
D007306:Insecticides; D009570:Nitriles; D063086:Organothiophosphates; D010573:Pesticide Residues; D011722:Pyrethrins; D012989:Soil Pollutants; D014230:Triazoles; C017160:cypermethrin; C017180:decamethrin; C012584:triazophos