摘要
贵州柑桔介壳虫有32种,其天敌有52种,介壳虫与天敌中有12种为贵州新记录。本文还采用了植物学上的频度分析法研究了介壳虫及其天敌发生分布的特点。分析表明群落的多样性指数(H')、均匀性(J)有很明显的季相变化。不同树龄、不同管理条件、综合治理与生物防治对H'、J、S(丰富性)、N(样本总虫数)都有影响。
There are 32 species of scale insects and 52 of their natural enemies in the citrus orchard of Guizhou Province. Among them there are 12 new records. The frequency concept of botany has been used for understanding the distribution feature of the scale-enemy. 40 species have been divided into three types: eurytopic species is 5, frequent species 5, rare species 30, This shows that the true pest-insect is rare. By using Berger-Parker dominance index, pest-insect dominant species and enemy-insect dominant species can be determined. The result shows that the arrowhead scale is the most important pest-insect dominant, and the Chilocorus bijugus Mulsant is enemy-insect dominant species in the vicinity of Guiyang. Shanon-Weaver's diversity index analysis shows that tree-aged, pest management techniques, different region, different season etc. influence the structure of scale-enemy community.
出处
《贵州科学》
1991年第3期209-214,共6页
Guizhou Science