论文部分内容阅读
采用同位素１４Ｃ示踪技术，研究初冬喷施多菌灵等防治云杉雪霉病和雪枯病，在雪盖条件下，药剂在云杉幼苗和土壤中的残留动态。结果表明，绝大部分药剂吸附在针叶表面，降解十分缓慢，１５０天时（相当融雪后期）残留量为喷药当天原始沉积量的４８．４％，高出病原菌的平均抑制中量５．２μｇ／ｇ；多菌灵在土壤中的移动性很小，全部剂量都集聚在０—１０ｃｍ表土层中，在０—２ｃｍ土层中，占总量的７２．５％，从而对田间试验筛选出的多菌灵，以及与其性能相近的甲基托布津、粉锈宁等杀菌剂的防治效果做出了准确的评价。
Isotopic 14C tracing technique was used to study the residual dynamics of pesticides in spruce seedlings and soil under snow cover conditions by spraying carbendazim in early winter. The results showed that most of the drug was adsorbed on the surface of conifer and the degradation rate was very slow. The residual amount was 48.4% of the initial deposition on the day of spray and the average inhibitory amount of 5.2μg / G; carbendazim mobility in the soil is very small, all the doses are gathered in the 0-10cm topsoil, 0-2cm soil layer, accounting for 72.5% of the total, so the field test screening Of carbendazim, and its performance similar to methyl thiophanate, triadimefon and other fungicides to control the effect of making an accurate assessment.