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›› 1994, Vol. 30 ›› Issue (1): 44-49.

• 论文 • 上一篇    下一篇

多菌灵在云杉幼苗及土壤中残留动态的研究

刘振坤 岳朝阳 张新平   

  1. 新疆林业科学研究院林业研究所,乌鲁木齐830063
  • 收稿日期:1992-07-23 修回日期:1900-01-01 出版日期:1994-01-25 发布日期:1994-01-25

STUDIES ON RESIDUE DYNAMICS OF CARBENDAZIM IN SPRUCE SEEDLING AND SOIL

Liu Zhenkun,Yue Zhaoyang,Zhang Xinping   

  1. Xinjiang Academy of Forestry Urumqi 830063
  • Received:1992-07-23 Revised:1900-01-01 Online:1994-01-25 Published:1994-01-25

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。

关键词: (14)C-多菌灵, 残留, 云杉, 土壤

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.

Key words: (14)C-carbendazim, Spruce, Residue, Soil