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通过田间植株直接施药-定期采样提取-高效液相色谱分析的方法,研究了多菌灵在杭白菊胎菊、菊花及土壤中的残留消解动态,测定了多菌灵在杭白菊胎菊和菊花中的最终残留量,并在室内探讨了不同温度对干胎菊和干菊花中多菌灵消解的影响。结果表明:在0.675和1.00 kg/hm22个施药剂量下,多菌灵在杭白菊土壤、胎菊和菊花中的消解半衰期分别为7.98～8.34 d、3.90～4.05 d和3.31～3.45 d;不同温度下,干胎菊和干菊花中多菌灵的半衰期存在显著性差异(P<0.05),其消解速率随温度升高而加快。采用50%多菌灵可湿性粉剂在杭白菊上以有效成分0.675 kg/hm2的剂量喷雾施用2次,第2次施药后21 d时多菌灵在干胎菊和干菊花中的残留量分别为0.182～0.294 mg/kg和0.371～0.381 mg/kg,远低于我国制定的多菌灵在怀菊中的最大残留限量标准(5 mg/kg)。
Carbendazim in Chrysanthemum, Chrysanthemum and soil by the direct application of plants - regular sampling and extraction - high performance liquid chromatographic analysis of carbendazim residues in Chrysanthemum, chrysanthemum and soil dynamics determination of carbendazim in Chrysanthemum and Chrysanthemum Chrysanthemum in the final residue, and in the room to explore the different temperatures on the dry Fritillaria and chrysanthemum carbendazim digestion. The results showed that the half-lives of carbendazim in soil, Fusarium chrysanthemum and Chrysanthemum were 7.98 ~ 8.34 d, 3.90 ~ 4.05 d and 3.31 ~ 3.45 d at 0.675 and 1.00 kg / hm2, respectively. There was a significant difference in half-lives of carbendazim between dried and dried chrysanthemum at temperature (P <0.05), and the digestion rate accelerated with increasing temperature. The 50% carbendazim WP was sprayed on the Chrysanthemum morifolium at an effective dose of 0.675 kg / hm2 two times. After 21 days of the second application, the residues of carbendazim in the dried chrysanthemum and dried chrysanthemum Respectively, 0.182 ~ 0.294 mg / kg and 0.371 ~ 0.381 mg / kg, which is much lower than the maximum residue limit of carbendazim in Chinese chrysanthemum (5 mg / kg).