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为明确我国东北地区亚洲玉米螟Ostrinia furnacalis(Guenée)不同世代的种群动态及寄主植物来源,利用性诱捕器监测了其不同世代的种群动态,并以雄蛾翅的稳定性同位素δ13C为标记鉴定其寄主植物的光合作用类型。结果表明,亚洲玉米螟成虫越冬代始见期在5月底,第1代终见期在9月中旬。公主岭、齐齐哈尔、沈阳等地越冬代和第1代亚洲玉米螟幼虫主要以C4植物为寄主,以C4植物为寄主的种群占所有种群的比例分别为72.19%~97.71%和95.18%~100%;2014年公主岭、齐齐哈尔、沈阳等地之间越冬代和第1代亚洲玉米螟幼虫以C3植物为寄主的种群比例无显著差异,2013年公主岭和2014年沈阳的越冬代和第1代幼虫期之间以C3植物为寄主的种群比例差异显著。研究表明,东北地区以C3植物为寄主的亚洲玉米螟种群较少。
In order to clarify the population dynamics and host plant sources of Ostrinia furnacalis (Guenée) from northeast China in different generations, the population dynamics of different generations were monitored using traps. The stability of the male moth wings was identified by δ13C The type of photosynthesis of the host plant. The results showed that the beginning of the overwintering generation of Asian corn borer adult at the end of May, the first generation of the deadline in mid-September. Most of the overwintering and first generation Asian corn borer larvae in Gongzhuling, Qiqihar and Shenyang were mainly hosted by C4 plants, and the host plants with C4 plants accounted for 72.19% -97.71% and 95.18% -100% of the total, respectively. In 2014, there was no significant difference in the proportion of overwintering and 1st generation Asian corn borer larvae hosted by C3 plants in Gongzhuling, Qiqihar and Shenyang. In 2013, Gongzhuling and the overwintering and larvae of Shenyang in 2013 There was a significant difference in the proportion of populations with C3 plants as hosts. Studies have shown that there is less population of Asiatic corn borer in Northeast China with C3 plants as host.