1) Nematode density
线虫密度
2) larval density
幼虫密度
1.
To investigate the effect of larval density on post-embryonic development and adult reproduction of Spodoptera exigua,we conducted a laboratory experiment in which larvae were reared at different larval densities(1,5,10,20 and 30 larvae/jar).
为了研究甜菜夜蛾Spodoptera exigua(Hbner)幼虫的密度对其发育及繁殖的影响,本实验观察了5种幼虫密度下(1,5,10,20,30头/瓶),幼虫发育和成虫繁殖情况。
2.
This paper mainly dealt in details with the effects of host plants and larval density on the development and production, and the pupal cold-hardiness of H.
本文首次较系统的研究了寄主植物对美国白蛾实验种群和自然种群基础生物学的影响,幼虫饥饿和幼虫密度对美国白蛾生长发育和繁殖的影响和美国白蛾不同时期蛹的抗寒能力变化。
3) population density
虫口密度
1.
Relationship between the number of resin exits caused by Hylobitelus xiaoi larvae and their mean population density in slash pine plantations;
萧氏松茎象流脂点与虫口密度的关系
2.
Correlation between the attacking rate and population density of Hylobitelus xiaoi larva;
萧氏松茎象幼虫有虫株率与虫口密度相关关系
3.
Influence of pruning on the population density of Ceroplastes japonicus and growth of trees;
修枝对日本龟蜡蚧虫口密度及树木生长的影响
4) scale density
蚧虫密度
1.
The results show that in polluted areas the scale density and its host plant s nutritional level were higher than that in the clear areas.
在污染区和清洁区,对瘤坚大球蚧密度和其寄主国槐树体营养(总糖、可溶性蛋白质、氨基酸、VB2)研究发现:污染区蚧虫密度和寄主营养水平均高于清洁区。
5) nymphal density
若虫密度
1.
Effects of nymphal density and rice growth stage on nymphal development, survival rate and wing dimorphism of different rice brown planthopper biotypes;
若虫密度和水稻生育期对稻褐飞虱不同生物型若虫历期、存活及翅型分化的影响
6) artemia density
卤虫密度
1.
Effect of artemia density on food intake of mysis of P.
用 1000ml小水体进行斑节对虾和凡纳对虾各期幼体对卤虫无节幼体摄食量的比较实验, 结果表明, 二种对虾的卤虫摄食量与卤虫密度有关, 在相同密度下, 糠虾期凡纳对虾卤虫日摄食量明显高于斑节对虾, 而卤虫密度对摄食量的影响凡纳对虾略低于斑节对虾, 仔虾期卤虫摄食量差异日渐减小, P5 ~P6已很接近。
补充资料：非密度制约因素(见密度制约因素)
非密度制约因素(见密度制约因素)
l焦非密度制约因素见生态因素、密度制约后
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条