Residue behavior of combination formulations of insecticides in/on cabbage and their efficacy against aphids and diamondback moth.
Persistence behavior of insecticides chlorpyriphos, profenofos, triazophos, cypermethrin, and deltamethrin following the use of three combination formulations Action 505 (chlorpyriphos + cypermethrin), Roket 44EC (profenofos + cypermethrin), and Anaconda Plus (triazophos + deltamethrin) was studied in cabbage following the spray application at the recommended and double doses. Bio-efficacy of these formulations was also evaluated against mustard aphids (Lipaphis erysimi Kaltenbach) and diamondback moth (Plutella xylostella L.). The residues of different insecticides persisted for 5-8 days at low dose and 8-12 days at high dose. The residues dissipated with time and 87-100% dissipation was recorded on the 8th day. The half-life values varied from 0.4 to 1.6 days. Based on the acceptable daily intake (ADI) values, a safe waiting period of 1 day has been suggested for the formulations Action 505 and Roket 44EC and 3 days for Anaconda Plus at the recommended dose of application. Action (1.6 L/ha) treatment was found to be the best as it significantly reduced the diamondback moth (DBM) (~60%) and aphid population (~70%) besides giving the highest yield (170% increase over control).
Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi, 110012, India, drsumangupta2002@yahoo.com.
Suman
S
Gupta
Rakesh K
RK
Sharma
Vijay T
VT
Gajbhiye
Ram K
RK
Gupta
D000818:Animals; D001042:Aphids; D001937:Brassica / Q000737:chemistry*; D004784:Environmental Monitoring; D006207:Half-Life; D007300:Insect Control / Q000379:methods; D007306:Insecticides / Q000032:analysis* / Q000633:toxicity; D009036:Moths; D010573:Pesticide Residues / Q000032:analysis* / Q000633:toxicity
D007306:Insecticides; D010573:Pesticide Residues