性信息素大面积诱捕法防治东北越冬代水稻二化螟

2002年和2003年，在吉林省柳河县绿色大米生产基地，开展了应用性信息素诱捕法防治越冬代水稻二化螟Chilo suppressalis的试验。与对照区相比，2002年和2003年两年诱捕区诱蛾量分别下降84.54%和83.75%,雌虫交配率分别下降54.10%和47.67%; 同时,诱杀区二化螟卵孵化率下降25.50%,卵块密度也显著降低。2002年二化螟雌雄性比由对照区的1.14上升为诱捕区的3.96，而 2003年由1.12上升到3.84；诱杀区二化螟幼虫为害率，无论是枯鞘、枯心，还是白穗,也较之对照区显著下降,造成稻谷产量损失也明显降低。通过上述一系列评价指标表明性信息素诱捕法能有效控制东北越冬代水稻二化螟，可为东北绿色大米的可持续生产提供技术支持。

Mass trapping of the overwintering generation stripped stem borer,Chilo suppressalis (Walker) (Lepidoptera: Pyralidae) with the synthetic sex pheromone in northeastern China

The suppressing effect of water traps baited with a 41: 5: 4 blend of Z11-16: Ald, Z13-18: Ald and Z9-16: Ald for mass trapping of the stripped stem borer (SSB), Chilo suppressalis (Walker) was evaluated in green rice production bases in Jilin Province of China in 2002 and 2003. The investigation showed that populations of the male SSB were reduced by 84.54% and 83.75 % in 2002 and 2003 respectively, compared with the untreated control plots. The sex ratio (female: male) of the SSB population in the trapping plots largely skewed to female. Also the female mating percentage and the density of the egg masses in the trapping plots was reduced significantly, compared with that of the control plots in both years. Correspondingly, the infestation levels of the withered leaf sheaths (WLS), dead heart (DH) and the white head (WH) plants destroyed by SSB larvae in 2002 and 2003 were notably reduced. The combined results indicate that mass trapping with the synthetic sex pheromone is a promising agent against SSB.