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棉铃虫Heliothis armigera(Hubner)是一种世界性害虫,也是我国棉区重要害虫。近时期以来,国内外都在开展棉铃虫不同世代的种群数量动态、危害损失及防治指标的研究。我国北方棉区第二代棉铃虫是防治的重点世代,根据幼虫危害习性和实践经验,曾提出过百株15粒卵或5头幼虫作为化学防治的指标,但未考虑发挥棉田生态系统自然控制调节能力,施药次数多、投资大、经济效益低。因此,我们从1983～1985年以棉田第二代棉铃虫为重点,在研究棉田自然种群生命表的基础上,采取田间接虫方法,
Heliothis armigera (Hubner) is a worldwide pest and an important pest in cotton area in China. Since the recent period, the population dynamics, harm losses and prevention and control indices of different generations of cotton bollworm have been studied at home and abroad. The second generation cotton bollworm in the northern cotton area of our country is the key generation for prevention and control. According to the harm habits and practical experience of larvae, over 100 eggs or 5 larvae have been put forward as indicators of chemical control. However, Regulatory capacity, the number of pesticides, large investment, low economic benefits. Therefore, we focused on the second generation cotton bollworm from 1983 to 1985, studied the natural population life table of cotton field,