在三化螟防治上,药剂的使用占着重要的位置。六六六是治螟的一种比较理想的药剂,它有很多优点,但大面积药剂治螟广泛开展以来,六六六的用量不断增加,生产未能满足要求。此外,六六六的内吸作用较弱,残效期短,在降雨季节施用,困难不少,因此有必要寻求一些治螟有效的内吸剂以代替六六六,同 In the stem borer control, the use of pharmaceutical occupy an important position. BHC is an ideal agent for treating borers and has many advantages. However, since the extensive use of large-scale pharmaceuticals for the treatment of borers, the dosage of BHC has been constantly increasing, and the production failed to meet the requirements. In addition, BHC is weak in internal absorption, short in residual period and difficult to apply in the rainy season, so it is necessary to seek some effective APIs instead of BHC