[Objective] The study was to provide the theoretical guidance for the control of rice sheath blight using the mixture of endophytic Bacillus megaterium strain B196 and fungicide. [Method] The toxicity of the mixture of endophytic strain B196 and jinggangmycin against Rhizoctonia solani was determined by inhibition rate method,and the effect of the mixture on R. solani was also tested. [Result] The mixture of B196 strain and 5% Jinggangmycin water agent with the mass ratio of 1∶68.47 had synergy effect,co-toxicity coefficient （CTC） was 209,the control effect of 200 μg/ml mixture against R. solani was 75.57% in field,which was 17.68% higher than that of single endogenous bacillus strain B196 treatments. [Conclusion] The mixture of endophytic strain B196 and Jinggangmycin had good control effect against R. solani.
【目的】明确18%2,4-滴微乳剂对非耕地薇甘菊的防治效果，为其推广应用提供科学依据。【方法】设18%2,4-滴微乳剂540.0、324.0、202.5和162.0 g a.i./ha 4个处理，与常用化学除草剂41%草甘膦异丙胺盐水剂推荐剂量1845.0 g a.i./ha及空白对照处理进行比较，在薇甘菊生长旺期施药，并于药前和药后15、30 d调查薇甘菊覆盖度，药后45 d调查薇甘菊覆盖度和鲜重，计算薇甘菊覆盖度防效及鲜重防效，2009、2010年两年重复试验。【结果】18%2,4-滴微乳剂在供试剂量下对薇甘菊有良好的防除效果，其中162.0-202.5 g a.i./ha剂量处理后45 d对薇甘菊覆盖度防效达97.74%-100.00%，鲜重防效达98.80%-100.00%，显著高于对照药剂处理的防效。【结论】18%2,4-滴微乳剂可有效防除非耕地薇甘菊，推荐使用剂量为162.0-202.5 g a.i./ha。
