西花蓟马与二斑叶螨的种间竞争关系

摘要

为了解和掌握西花蓟马和二斑叶螨的种间关系,揭示其种群变化规律,在玻璃温室盆栽条件下,调查了两种害虫单种种群、不同比例混合种群及危害先后顺序等不同处理下,西花蓟马和二斑叶螨在菜豆上种群动态的变化.结果显示,单种种群中,二斑叶螨的种群增长速度大于西花蓟马；在不同比例的混合种群中,西花蓟马和二斑叶螨的增长均受到不同程度的抑制,起始种群密度越高受到的抑制越小；西花蓟马和二斑叶螨不同危害顺序中,先危害的占有明显的优势,对后一种害虫有明显的抑制作用.结论:在西花蓟马与二斑叶螨的种间竞争过程中,竞争的强度与害虫种类、初始种群数量的大小和害虫危害的先后时间有关.%The population dynamics of F. Occidentalis and T. Urticae in bean was investigated to understand the interspecies relation between F. Occidentalis and T. Urticae under pot culture condition. The results showed that the increment speed of T. Urticae population was higher than F. Occidentalis in single population. The increment of F. Occidentalis and T. Urticae in mixed populations with different proportions was inhibited to varying degrees and the inhibited degree of the initial population with a higher density was lower. The prior infection pest had the obvious superiority and the significant inhibiting effect on another pest in infection time. Conclusion: The competitive intensity between F. Occidentalis and T. Urticae related to pest species, initial population quantity and infection time.