春季香蕉假茎象甲自然种群生命表的研究

Study on the Life Table of Natural Population of the Banana Pseudostem Weevil (Odoiporus longicollis Oliver) in Spring

通过调查研究 ,组建了以作用因子为组分的春季香蕉假茎象甲 (OdoiporuslongicollisOliver)自然种群生命表。在此基础上运用排除作用控制指数法 ,分析了各种因子对假茎象甲自然种群的作用。结果表明 ,春季假茎象甲自然种群趋势指数成长蕉株上平均为 4 .348 1,留头蕉茎上平均为 3.6 6 2 8;捕食及其他因子对该虫种群控制作用最大 ,排除作用控制指数成长蕉株为 1.92 5 6 ,留头蕉茎上为 2 .35 7 7;自然死亡作用次之 ,成长蕉株为 1.36 0 7,留头蕉茎上为 1.35 5 4 ;寄生或疾病因子作用最小 ,成长蕉株为 1.198 8,留头蕉茎上为 1.16 6 8。捕食及其他是该虫种群增长的重要控制因子。

The active factor life tables of natural population of the banana pseudostem weevil ( Odoiporus longicollis Oliver) were established. The controlling effect of active factors was evaluated with exclusion index of population control (EIPC). The results showed that the population trend indices in growing and harvested banana trunks were 4.3481 and 3.6628, respectively. EIPC of predation and others in growing and harvested banana trunks were 1.9256 and 2.3577, respectively. EIPC of natural death were 1.3607 and 1.3554. EIPC of parasitism and disease in growing and harvested banana trunks were 1.1988 and 1.1668. The factor of predation and others was important.