Abstract:
The insect resource from jujube in Ningxia was studied, and insect diversity and dominant population dynamic were analysed. The results showed that there were 10 ordo, 59 familia,136 species. Mose of them belonged to Lepidoptera and Coleoptera. The diversity index on August 15 was maximum, which declared that the species of insects was plentiful in this period. The diversity index in September was 0.78, and that in July was the lowest. Evenness indexes in August, September and July wese 0.81, 0.78 and 0.08,respectively.The change tendency of evenness index was similar to that of diversity index. The dominant centrality in August was the lowest, and after then in September. The dominant centrality in July was the highest. The tendency of dominant centrality was contrary to that of evenness index. Meantime the occurrence and damage of dominant pests, such as Zamacra excavate Dyar, Carposina niponensis Walsingham and Dasineura sp, were also researched. Based on the results, the life history,habits, growth and decline regulation of these dominant population were obtained. In conclusion, the research established the foundation for pest integrated control in jujube.
