STUDIES ON SEX PHEROMONE OF YELLOW RICE BORER, Scirpophaga incertulas (Walker), Pyralidae, Lepidoptera——IDENTIFICATION OF CHEMICAL STRUCTURE AND FIELD TRAPPING TESTS

Abstract

The natural sex pheromone of the yellow rice borer, Scirpophaga incertulas is known to consist of 3 components: 16: Ald (Ⅰ), (Z)-9-16: Ald (Ⅱ) and (Z)-11-16: Ald (Ⅲ) by using single sex pheromone gland technique, high performance capillary CC, GC-MS, EAG, micro-chemical reaction as well as field trapping tests. Analysis of single sex pheromone gland showed that the precise ratio of the 3 components is 18.8 (Ⅰ): 27.1 (Ⅱ): 54.1 (Ⅲ) (％). The septura lure made according to the above precise blending showed strong attractancy in the field trapping tests. Maximun catch of a trap was 45 males/ day in the first generation in Guangxi Zhuang Autonomous Region. The average catch per day was 15.8 males.