壬酸水溶液对云南木蠹象幼虫拒食作用研究  

Research on the Antifeedant Action of Aqueous Nonanoic Acid on Pissodes yunnanens Larvae

作　　者：代艳梅[1,2] 吴伟[1] 刘德波[1,2] 文灿[1,2] 张真[2] 

机构地区：[1]西南林学院保护生物学学院,云南省高校森林灾害预警与控制重点实验室,云南昆明650224 [2]中国林业科学研究院森林生态环境与保护研究所,国家林业局森林保护学重点实验室,北京100091

出　　处：《安徽农业科学》2009年第11期5037-5039,共3页Journal of Anhui Agricultural Sciences

摘　　要：[目的]为防治云南木蠹象找到无公害的新型药剂。[方法]按内比法将90%壬酸配成所需浓度,用非选择性拒食法测定药剂的拒食作用,以幼虫校正死亡率为指标评价拒食效果。[结果]保湿饲养法的死亡率回归方程为y1=4.883+0.292x,相关系数为0.408,LC50=2.517 7 mg/L,其拒食率回归方程为y2=4.562+0.337x,相关系数为0.423,AFC50=19.952 6 mg/L。喷枝保湿饲养法的死亡率回归方程为y3=4.388+0.793x,相关系数为0.373,LC50=5.915 6 mg/L,其拒食率回归方程为y4=5.175+0.274x,相关系数为0.420,AFC50=0.229 6 mg/L。2 000 mg/L壬酸水溶液的初始死亡率和最高死亡率最高,达到最高死亡率的时间最佳,1 000 mg/L次之。2 000mg/L壬酸水溶液的致死中时间最短,为6.9 d,而对照的致死中时间最长,为53.7 d。[结论]2 000和1 000 mg/L壬酸水溶液的拒食作用较好。[ Ohjective ] Tbe aim was to find new pesticides without public harm for controlling Pissodes yunnanens in pine. [ Method ] The aqueous nonanoic acid at demanded conch, was prepared with 90% nonanoic acid by inner ratio method. The antifeedant actions of pesticides were determined by non - selective antifeeding method and the antifeedant effects were evaluated with the corrected mortality of larvae as index. [ Result] The mortality regression equation of wet remaining feeding method was y1 = 4. 883 ＋ 0. 292x, its correlation coefficient was 0. 408 and its LC50 was 2.517 7 mg/L; the regression of its antifeedlng rate was y2 = 4. 562 ＋ 0. 337x, its correlation coefficient was 0. 423 and its AFC50 was 19. 952 6 mg/L. The mortality regression equation of branch - sprayed wet - remaining feeding method was y3 = 4. 388 ＋ 0. 793x, its correlation coefficient was 0. 373 and its LC50 was 5. 915 6 rag/L; the regression of its antifeeding rate was y4 =5. 175 ＋0. 274x, its correlation coefficient was 0. 420 and its AFC50 was 0. 229 6 mg/L. The initial mortality and highest mortality of aqueous nonanoic acid at 2 000 mg/L were highest and the time when its highest mortality was achieved was best, that of aqueous nonanoie acid at 1 000 mg/L were secondary. The median lethal time of aqueous nonanoic acid at 2 000 mg/L was shortest, being 6.9 d and that of CK was longest, being 53.7 d. [ Conclusion] The antifeedant aclions of aqueous nonanoic acid at 2 000 and 1 000 mg/L were better.

关 键 词：云南木蠹象 壬酸 拒食作用 

分 类 号：S763.3[农业科学—森林保护学]