米象对4种寄主偏好性的研究

The study of four kinds of host preference on Sitophilus oryzae Linnaeus

利用Y型嗅觉仪测定了米象Sitophilus oryzae Linnaeus对4种寄主的行为趋性反应,同时测定了寄主对米象后代种群生长发育的影响。结果表明,4种寄主对米象均具有显著的引诱作用,在4种寄主之间分组比较时,寄主对米象的引诱作用的强弱表现为高粱>糙米>小麦>燕麦;寄主对米象后代种群生长发育的影响具体表现为,在米象F1代种群数量上各寄主除了糙米和燕麦其它寄主间均存在显著性差异,依次排序为糙米、燕麦、高粱,小麦,而对于世代发育历期,除了高粱和燕麦间不存在差异显著性外,其它寄主间均存在差异显著性,排序依次为糙米、高粱、燕麦、小麦。由于高粱对米象具有较强的引诱作用,可利用高粱结合诱捕器对米象进行诱捕、监测和防控。

Using Y - tube olfactometer, behavior response of Sitophilus oryzae Linnaeus to four kinds of host grains were tested. And effects of host grains on growth and development of S. oryzae Linnaeus progeny populations were determined. The results indicated that four host grains had strong behavior selection to the S. oryzae Linnaeus. When host from different groups were comparatively tested, the attraction of S. oryzae Linnaeus showed significantly the strongest host preference to sorghum, followed by brown rice, wheat, and avena sativa in turns. The effects of host grains on growth and development of S. oryzae Linnaeus progeny populations showed that the number of F~ generation population on each host had significant differences, in the following order was brown rice, arena sativa, sorghum, wheat; For the generation and development period, no significant difference between sorghum and arena sativa in addition, but there are differences significant between the other hosts, in the order of brown rice, sorghum, arena sativa, wheat. Because sorghum had strong attraction on S. oryzae, We can use the sorghum combination trap for trapping, monitoring and controlling them.