Department of Entomology, Punjab Agricultural University, Ludhiana, Punjab 141004, India.
Bull Environ Contam Toxicol. 2010 Feb;84(2):225-9. doi: 10.1007/s00128-009-9903-5.
Dissipation of beta-cyfluthrin and imidacloprid was studied following three applications of a combination formulation of Solomon 300 OD (beta-cyfluthrin 9% + imidacloprid 21%) @ 60 and 120 g a.i. ha(-1) at 7 days interval. Samples of brinjal were collected at 0, 1, 3, 5, 7, 10 and 15 days after the last application and residues of beta-cyfluthrin and imidacloprid were estimated on gas liquid chromatography (GLC) and high performance liquid chromatography (HPLC), respectively. Half-life periods for beta-cyfluthrin were found to be 1.74 and 1.39 days and for imidacloprid these values were observed to be 2.31 and 2.18 days, respectively, at single and double the application rate. beta-Cyfluthrin residues dissipated below the limit of quantification (LOQ) of 0.01 mg kg(-1) after 5 and 7 days, respectively, at single and double the application dosages whereas imidacloprid residues took 10 days for both the dosages. Soil samples collected after 15 days after the last application did not show the presence of beta-cyfluthrin and imidacloprid at their detection limit of 0.01 mg kg(-1).
在间隔 7 天、施药 3 次的条件下，Solomon 300 OD（氯氟氰菊酯 9%+吡虫啉 21%）组合制剂以 60 和 120 g a.i. ha(-1)的剂量施用于茄子后，研究了氯氟氰菊酯和吡虫啉的消解情况。末次施药后 0、1、3、5、7、10 和 15 天分别采集茄子样本，并用气相色谱（GLC）和高效液相色谱（HPLC）分别测定氯氟氰菊酯和吡虫啉的残留量。单、双剂量处理下，氯氟氰菊酯的半衰期分别为 1.74 和 1.39 天，吡虫啉的半衰期分别为 2.31 和 2.18 天。单、双剂量处理下，氯氟氰菊酯分别在 5 和 7 天消解至低于 0.01 mg kg(-1)的定量限，而吡虫啉则需要 10 天。末次施药后 15 天采集的土壤样本中，氯氟氰菊酯和吡虫啉均未检出，检出限为 0.01 mg kg(-1)。
