摘要
腹管食螨瓢虫对其猎物桔全爪螨种群空间,数量及时间动态有明显的反应。在空间上,捕食者集中分布于猎物密度高的外层树冠,除其幼虫集中分布于树冠的中上部外,其余各虫态及其猎物种群在树冠各位点皆无显著的差异。捕食者能在果园内有效地搜索并趋集于猎物密度高的树上,对猎物种群聚集扩散趋势显示出有规则的反应。在数量上,捕食者在田间建立种群后,其数量消长将随猎物种群数量而起伏。捕食者对猎物种群空间及数量动态的反应都有10天左右的时滞。腹管食螨瓢虫对桔全爪螨自然控制效能高,经人工大量繁殖释放和助迁引进,是桔全爪螨综合治理的一个重要途径。
The population dynamics of Stethorus siphonulus had a significant response to that of its prey Panonychus citri in space,number and time. Both the predator and the prey had a greater number in the periphery of a tree,but they didn't show apparent heterogenity in their distributions among the 4 cardinal points of the compass and the 3 levels(top,middle and bottom)of a tree.The predator showed the ability to find and aggre- gate in the trees where the densities of its prey were higher.Also,the pred- ator showed a regular response to the tendencies of the aggregation and dis- persion of its prey.Once the predator established its population in the orch- ards,its densities would increase or decrease as those of its prey did.The responses both in space and in number had a lag period about 10 days.S. siphonulus had a better controlling effectiveness on P.citri.The measures such as artificial rearing and releasing were very important in the appli- cation of the predator for the mite management.
基金
国家自然科学基金资助
农业部生防项目补助
关键词
腹管食螨瓢虫
桔全爪螨
生物防治
Stethorus siphonulus
Panonychus citri
population dynamics
controlling effectiveness
