Population field studies of the aphidophagous ladybird beetle Harmonia axyridis (Coleoptera: Coccinellidae): Life tables and key factor analysis

摘要: 1) Life tables of the predatory ladybird beetleHarmonia axyridis were analysed by taking samples from twenty or four sites colonized eight species aphids for two years. 2) Larval mortality was a key factor in theH. populations. Mortality all stages tended to be density-dependent when life cycles divided into developmental stages, except case at hatching due sibling cannibalism. 3) Sibling and non-sibling cannibalism played an important role on population stability persistence.