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作 者 ：刘振坤 岳朝阳 张新平

期 刊 ：林业科学 1994年 30卷 1期 页码：44-49

关键词：(14)C-多菌灵；残留；云杉；土壤；

Keywords:(14)C-carbendazim, Spruce, Residue, Soil,

摘 要 ：采用同位素⁽¹⁴⁾C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。

Abstract:The present paper deals with the residue dynamics of carbendazim in spruce seedling and soil using ¹⁴C-carbendazim to control thesnow blights and molds of spruce under simulated early winter and snow covered conditions.The rate of ¹⁴C-carbendazim used was 2g/m².The results showed that almost all the ¹⁴C-carbendazim was absorbed on the surface of the needles and that the degradation was so slowly that 22.78μg/g residue was still on the needle surface after 150 days(just as late snow-melting period).89%¹⁴C-carbendazim gathered in the surface soil of 0-6cm depth.The residue on the needle surface greatly oversteps the EC₍₅₀₎(5.2μg/g).The results proved the controlling effects of carbendazim,forinstance,Thiophanate methy 1,and Thiadimefon in the field tests.

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