花椒全爪螨实验种群密度效应研究  

Density-Dependent Effects of the Experimental Population of Panonychus citri(McGregor)

作　　者：杨再艳[1] 刘映红[1] 李华[1] 王晓娜[1] 杨德军 

机构地区：[1]西南大学植物保护学院,重庆400715 [2]重庆市日用化学工业研究所,重庆400065

出　　处：《西南大学学报（自然科学版）》2008年第6期46-49,共4页Journal of Southwest University(Natural Science Edition)

基　　金：国家“863”先导资助项目(2005AA001260)

摘　　要：系统研究了花椒全爪螨实验种群的密度效应.结果表明：花椒全爪螨卵期不存在密度效应,在卵密度为10-60粒/叶,温度（25±1）℃,相对湿度75%±5%,光照14（Light）∶10（Dark）条件下,孵化率高达95%-100%,卵发育历期为6.6-6.8 d.但初始幼螨密度对幼若螨的存活率、发育速率以及羽化成螨的性比、繁殖力和寿命均存在明显影响.在3-36头/叶时,幼若螨的存活率与发育速率随密度的增高而呈下降和减慢的趋势,并且当代性比向偏雌方向发展.采用线性方程Y=9.398 lnN1＋37.666,（R=0.978）来描述雌成螨每雌产卵量（Y）与幼螨密度（N1）之间的关系.花椒全爪螨的生长发育和繁殖能力与卵密度无关,却受幼螨密度的影响.The density-dependent effects of the experimental population of Panonychus citri on the leaves of Zanthoxylum bungeanum were studied at （25±1）℃ , RH 75%±5% and photoperiod of 14 ： 10 （L：D）. The results showed that the density of eggs did not affect their survival and development significantly. The survival rate of the mite was 95%-100% and and the development period lasted 6. 6-6. 8 d when the density was in the range of 10-60 eggs per leaf. However, the density of first larvae showed a significant effect on the development, survival and reproduction of the mite. The survival and development rate of the immature stages declined with the increase in density in the range of 3-36 individuals/leaf, whereas the female to male ratio tended to rise. The relationship between fecundity （Y） and the first larval density （N1） could be described by the equation. Y= -9. 398 In N1 ＋37. 666, （R=0. 978）.

关 键 词：花椒全爪螨 实验种群 密度效应 

分 类 号：S433.7[农业科学—农业昆虫与害虫防治]