苯醚甲环唑的耗散行为和最终残留水平,丙草胺,丙环唑,使用田间试验和实验室测定研究了无花果中的吡唑酮酯。三因素,设计了三水平正交试验来优化该方法的预处理条件。建立了高效液相色谱-串联质谱法测定苯醚甲环唑的方法,丙草胺,丙环唑,和无花果中的吡唑醚酯残留物。无花果中所有四个靶标的定量极限为0.002mg/kg。苯醚环唑,丙草胺,丙环唑,在无花果中,吡唑酯是易消化的农药,半衰期为6.4、6.2、4.8和7.9天,分别。苯醚甲环唑的残留,丙草胺,丙环唑,无花果中的吡唑酮酯低于欧盟确定的0.1、0.03、0.01和0.02mg/kg的残留水平,分别,应用后第7天。吡唑酮,丙环唑,苯醚甲环唑,和丙草胺以75、125、150和200mga.i./kg的剂量以7天的间隔施用两次,最后一次施用后7天,无花果中四种杀菌剂的残留物是可以接受的。因此,根据方案,70%苯醚甲环唑-丙氯醚可湿性粉剂和40%吡唑酮-丙环唑水性乳剂的安全间期可设定为7天.
Dissipative behavior and final residue levels of difenoconazole, prochloraz, propiconazole, and pyraclostrobin in figs were investigated using field trials and laboratory assays. A three-factor, three-level orthogonal test was designed to optimize the pretreatment conditions of the method. A method was established using high-performance liquid chromatography tandem mass spectrometry for the
determination of difenoconazole, prochloraz, propiconazole, and pyraclostrobin residues in figs. The limit of quantification for all four targets in figs was 0.002 mg/kg. Difenoconazole, prochloraz, propiconazole, and pyraclostrobin are readily digestible pesticides in figs with half-lives of 6.4, 6.2, 4.8, and 7.9 days, respectively. Residues of difenoconazole, prochloraz, propiconazole, and pyraclostrobin in figs were below the European Union established residue levels of 0.1, 0.03, 0.01, and 0.02 mg/kg, respectively, at day 7 after application. Pyraclostrobin, propiconazole, difenoconazole, and prochloraz were applied twice at doses of 75, 125, 150, and 200 mg a.i./kg at 7-day intervals, and the residues of the four fungicides in figs were acceptable 7 days after the last application. Therefore, the safety interval can be set at 7 days for 70% difenoconazole-prochloraz wettable powder and 40% pyraclostrobin-propiconazole aqueous emulsion according to the protocol.