Imidacloprid was sprayed on mango cv. Dashehari at 0.3 mL L(-1) of water during pre-bloom stage with 6-8 cm panicle size (first week of March) to control hopper and carbosulfan was sprayed at 2.0 mL L(-1) of water in the trees of mango hybrid (H-1000) during fruit development stage (first week of May) to control leaf webber. Residues of both the insecticides were analysed in peel, pulp and fruit at different stages of fruit development and maturity. The initial residues of imidacloprid, after 30 days of spraying, were 1.21, 0.56 and 1.77 mg kg(-1) in peel, pulp and whole fruit, respectively. The residues persisted in peel for 60 days and in pulp for 50 days and dissipated with a half-life of 38 days. Mature Dashehari fruits at harvest (after 85 days of spraying) were free from imidacloprid residues. Carbosulfan in mango peel dissipated from 5.30 mg kg(-1) (after 1 h of spraying) to 0.05 mg kg(-1) at the time of harvest (after 45 days of spraying). Carbosulfan residue in pulp was very low (0.08 mg kg(-1)) after 1 h of spraying, which increased gradually to 0.90 mg kg(-1) after 10 days and finally came down to 0.04 mg kg(-1) after 26 days of spraying. The insecticide residue was not detected in the pulp at the time of harvest. The residues persisted in pulp for 26 days and in peel for 45 days and degraded with a half-life of 7 days. The dissipation of both imidacloprid and carbosulfan followed first order rate kinetics in whole fruit (peel + pulp). Therefore, the safe pre-harvest intervals were suggested to be 55 days for imidacloprid and 46 days for carbosulfan before consumption of mango fruits after spraying of these insecticides.

译文

:吡虫啉喷在芒果简历上。在花前期,以6-8厘米穗大小(3月的第一周),以0.3 mL L(-1)的水量的Dashehari,以控制漏斗和碳硫丹在树上的树木中以2.0 mL L(-1)的水量喷洒芒果杂种(H-1000)在果实发育阶段(5月的第一周)以控制叶片韦伯。在水果发育和成熟的不同阶段,对果皮,果肉和水果中两种杀虫剂的残留进行了分析。喷洒30天后,吡虫啉的初始残留分别为果皮,果肉和整个水果中的1.21、0.56和1.77 mg kg(-1)。残留物在果皮中持续60天,在果肉中持续50天,并以38天的半衰期消散。收获时(喷洒85天后)成熟的Dashehari果实不含吡虫啉残留。芒果皮中的硫丹从收获时(喷雾45天后)从5.30 mg kg(-1)(喷雾1 h后)消散至0.05 mg kg(-1)。喷洒1 h后纸浆中的硫丹残留量非常低(0.08 mg kg(-1)),经过10天后逐渐增加至0.90 mg kg(-1),最后在26天后降至0.04 mg kg(-1)喷涂天数。收获时在果肉中未检测到杀虫剂残留。残留物在果肉中持续26天,在果皮中持续45天,并以7天的半衰期降解。吡虫啉和硫丹的消散都遵循整个水果(果皮果皮)中的一级速率动力学。因此,建议在喷洒这些杀虫剂后食用芒果果实之前,吡虫啉的安全收获前间隔为55天,碳硫丹为46天。

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