几种橡胶载体对马尾松毛虫性信息素几何构型异构化的影响

THE INFLUENCE OF RUBBER SUBSTRATES ON ISOMERIZATION OF THE SEX PHEROMONE COMPOUNDS OF THE PINE CATERPILLAR MOTH IN PHEROMONE DISPENSERS

马尾松毛虫ＤｅｎｄｒｏｌｉｍｕｓｐｕｎｃｔａｔｕｓＷａｌｋｅｒ性信息素的主要活性组分为顺５，反７－十二碳二烯醇、顺５，反７－十二碳二烯基乙酸酯、顺５，反７－十二碳二烯基丙酸酯，在橡胶塞诱芯载体上很快发生异构化。半月后以顺反式为主的三组分已改变为以反反式为主体，反顺式和顺顺式也增加了。因而，此类材料不宜作为共轭二烯类信息素的载体。本文报告了一种硅橡胶材料对共轭双键具有相当小的影响，并可望成为含有共轭双键结构的昆虫信息素的载体材料。

Z5, E7--Dodecadien--o1,its acetate and propionate, the major sex pheromone components of the pine caterpillar moth, Dendrolimus punctatus Walker,were isomerized facilely on natural rubber dispensers. The high percentage of the Z,E--isomers in the original synthetic samples decreased quickly' After 15 days the E,E--isomers became dominant. The contents of E, Z--and Z, Z--isomers also increasedto certain extent. It seemed that the natural rubber was not a good matrix as a dispenser for sex pheromone with conjugated double bonds' It was also demonstratedthat a kind of silicone rubber had minimum effect on isomerization.