Dissipation kinetics of spinosad on cauliflower (Brassica oleracea var. botrytis. L.) under subtropical conditions of Punjab, India.
Residues of spinosad were estimated in cauliflower curds using high performance liquid chromatography (HPLC) and confirmed by high performance thin layer chromatography (HPTLC). Following three application of spinosad (Success 2.5 SC) at 15 and 30 g a.i. ha−1, the average initial deposits of spinosad were observed to be 0.57 and 1.34 mg kg−1, respectively. These residues dissipated below the limit of quantification (LOQ) of 0.02 mg kg−1 after 10 days at both the dosages. The half-life values (T 1/2) of spinosad were worked out to be 1.20 and 1.58 days, respectively, at recommended and double the recommended dosages. Thus, a waiting period of 6 days is suggested for the safe consumption of spinosad treated cauliflower.
Mandal
Kousik
K
Department of Entomology, Punjab Agricultural University, Ludhiana, Punjab 141004, India. kousik11@gmail.com
Jyot
Gagan
G
Singh
Balwinder
B
D001937:Brassica / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D004338:Drug Combinations; D005506:Food Contamination / Q000032:analysis; D006207:Half-Life; D007194:India; D007306:Insecticides / Q000032:analysis*; D007700:Kinetics; D018942:Macrolides / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis
D004338:Drug Combinations; D007306:Insecticides; D018942:Macrolides; D010573:Pesticide Residues; C415329:spinosad