Abstract: Suppressing effect of mass trapping of synthetic sex pheromone against the rice stem borer during the flight periods of over wintering and the 1st generation was investigated in rice field in Lujiang County, Anhui Province in 1999. Results showed that population density of rice stem borer in pheromone treated plot was lower than that of the control. The number of egg masses per 100 tiller decreased by 74.39% and population size of adult males of the 1st generation decreased by 61.41% as compared with the control. Meanwhile, damage by the stem borer larvae in pheromone treated plot was lower than that of the control and there was significant difference (t test, P=0.05). Percentages of brownish leaf sheath per 100 tiller, dead heart plant and white head plant decreased by 70.90%, 57.01% and 44.30%, respectively as compared with the control. Significance of these results was discussed in the context of integrated management of the rice stem borer. It might be concluded that mass trapping by using synthetic sex pheromone of rice stem borer is an environment friendly alternative to chemical insecticides.

Key words: rice stem borer, sex pheromone, mass trapping, rice

摘要： 应用二化螟性信息素(3种主要组分为Z11-16-Ald，Z13-18-Ald和Z9-16-Ald，剂量为300 μg)对60 hm[sup]2[/sup]早稻田的越冬代和第一代二化螟成虫进行了大面积诱捕，田间采用绿色水盆诱捕器，布设密度为25个/hm[sup]2[/sup]。对照区为24 hm[sup]2[/sup]种植者使用化学农药代替性信息素防治的水稻田，结果表明诱捕区的卵块数比对照区有明显下降，下降率为74.39%；第一代二化螟成虫的发生量较对照区有明显下降，下降率为61.41%；诱捕区田间稻丛的百株枯鞘率、枯心率和白穗率比对照区有明显下降，下降率分别为70.90%、57.01%和44.30%；诱捕区未使用农药，但防治效果好于对照区(平均施药1.24次)。

关键词: 二化螟, 性信息素, 大量诱捕, 水稻