| 孔文军,张建华,贺玲.北疆棉铃虫自然种群生命表的初步研究[J].植物保护,2009,35(4):58-62. |
| 北疆棉铃虫自然种群生命表的初步研究 |
| Preliminary studies on life table of natural populations of the cotton bollworm in Northern Xinjiang |
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| DOI： |
| 中文关键词: 棉铃虫 生命表 关键虫期 |
| 英文关键词:cotton bollworm life table key pest period |
| 基金项目:新疆生产建设兵团博士基金? |
| 孔文军 张建华 贺玲 |
| 石河子大学农学院植物保护系，石河子832003 |
| 摘要点击次数: 566 |
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| 中文摘要: |
| 采用作用因子构建了北疆棉铃虫自然种群生命表,并对棉铃虫种群生命表进行了研究和讨论。结果表明：由于棉田捕食性天敌的大量发生，北疆棉铃虫2代的3、4龄是关键虫期；另外， 2007年2代6龄发生期大量降雨,气温很低,空气潮湿,不利于棉铃虫幼虫的发育生长，同时茧蜂和寄蝇等寄生性天敌也大量发生，因此6龄也是关键虫期。棉铃虫3代的低龄期，由于棉田捕食性天敌草蛉、瓢虫、蜘蛛、食虫蝽的大量发生，卵至1龄为关键虫期。同时这段时期大量降雨，气温降低也不利于棉铃虫幼虫的生长。 |
| 英文摘要: |
| The acting factors were used to build a life table of natural populations of the cotton bollworm in northern Xinjiang, and the life table was studied and discussed. The results showed that the predators substantially occurred in cotton fields, and the 3rd and 4th instars of the 2nd generation of the bollworm was the key pest period. In 2007, the 6th instars of the 2nd generation occurred during heavy rainfall period, when the temperature was very low and the air was humid, which was not conducive to the growth of the cotton bollworm larvae. Simultaneously, many parasites also occurred, such as braconid flies and tachina flies, so the 6th instars was also a key pest period. During young period of the 3rd generation of the cotton bollworm, the period from eggs to the 1st instars was also the key pest period because of substantial occurrence of the predators, including chrysopa, ladybug, spider and a large number of insect eating bugs. At the same time, substantial rainfall and lower temperature were not conducive to the growth of the cotton bollworm larvae. |
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