1) increasing and decreasing of parasite density
原虫密度消长
3) Aphids fluctuation
蚜虫消长
4) 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。
5) 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
6) 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。
补充资料：消长
1.增减;盛衰。 2.谓变化。
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