作　　者： ; ; ; ; ; (戚大国）;

机构地区： 上海市农业科学院

出　　处： 《生物防治通报》 1993年第4期160-162,共3页

摘　　要： 室内生物测定表明,Bt液剂和不同比例的25％杀虫双混用对稻纵卷叶螟都有不同程度的增效作用,其中3:1和1:1(Bt:杀虫双)混用增效作用最为明显,共毒系数分别为265和298。1:1混用的毒效为杀虫双单用的1.71倍。田间小区试验表明,1:1混用的防治效果接近于同剂量的杀虫双。 Various degrees of synergic effects of Bacillus thuringiensis aqueous concentrate and 25% dimethypo against Cnaphalocrocis medinalis were obtained in a laboratory bioassay when the bio-pesticide was used in mixture with dimethypo at different ratios. Optimal synergistic activity occurred at 3:1 and 1:1 mixture ratios with the toxicity coefficients of 265 and 298, respectively. The toxicity of the mixture at 1:1 ratio was 1.71 times higher than that of dimethypo alone. Applying the mixture at 1:1 ratio in the field plot test gave approximately the same control effect as using dimethypo alone at the same treatment dose.

关 键 词： 稻纵卷叶螟 杀虫双 苏云金杆菌

领　　域： [农业科学] [农业科学]