竹裂爪螨实验种群密度效应研究  

DENSITY-DEPENDENT EFFECTS OF THE EXPERIMENTAL POPULATION OF SPIDER MITE, SCHIZOTETRANYCHUS BAMBUSAE RECK (ACARI:TETRANYCHIDAE)

作　　者：刘怀[1] 赵志模[1] 吴仕源[1] 徐学勤[2] 李映平[2] 

机构地区：[1]西南农业大学植物保护系,重庆400716 [2]四川省林业厅森保站,四川成都610081

出　　处：《西南农业大学学报（自然科学版）》2001年第3期249-251,共3页Journal of Southwest Agricultural University

基　　金：四川省林业厅应用基础项目资助

摘　　要：系统研究了竹裂爪螨实验种群的密度效应 ,结果表明 ,竹裂爪螨卵期不存在密度效应 ,在卵密度为 5～ 6 0粒 /叶 ,温度 2 5℃± 0 .5℃ ,光照 14L :10D条件下 ,孵化率为 92 .2 2 %～ 10 0 % ,卵发育历期为 4.4天～ 4.7天。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性比、繁殖力、寿命都均有明显影响 ,即在 3～ 48头 /叶的幼虫密度下 ,幼若螨的存活率与发育速率随密度的增高而呈现下降或减慢的趋势 ;而相继的成螨种群随密度的增高表现为雌性比增加 ;雌成螨的每雌产卵量 (Y)与初始幼螨密度 (X)之间呈线性关系Y =79.8779- 1.36 5 7X(R =0 .96 47 )。A systematic study was made of the density-dependent effects of the experimental populations of Schizotetranychus bambusae Reck at 25℃±0.5℃and 14 (light):10 (dark). The density of eggs did not significantly affect their survival and development. Their survival rate was 92.22% ～100% and their development stage lasted 4.4～4.7 days when the density was in the range of 5～60 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 3～48 individuals/leaf, whereas the female to male ratio tended to rise. The relationship between fecundity ( Y ) and the first larval density ( X ) could be described as the equation: Y=79.8779-1.3657X, (R= 0.9647 ** , f (1,9) =120.9203).

关 键 词：竹裂爪螨 实验种群 密度效应 毛竹 害螨 

分 类 号：S763.75[农业科学—森林保护学] S763.46[农业科学—林学]