1) 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。
2) Scale insect
蚧虫
1.
Survey on scale insects and natural enemies of landscape plants;
园林植物蚧虫及其天敌调查
2.
Based on literatures and documents, 258 species to 97 genera to 12 families of scale insects damaging to flowers and plants in Zhejiang province(Homoptera:Coccidea)were recorded.
在检索文献资料和调查的基础上,对浙江省花木蚧壳虫分布、种类和为害程度进行了补充整理,收录浙江省花木蚧虫 12 科 97 属 258 种。
3.
According to the investigations from 10 cities of Fujian province,scale insects of Cycas revolute were found from 4 families,10 genera and 15 species,in which the most widespread and harmful species were Saissetia coffeae and Chrysomphalus bifasciculatus.
通过对我省 10县市的调查、采集和鉴定 ,苏铁蚧虫计有 15种 ,隶属 4科、10属。
3) coccid
[英]['kɔksid] [美]['kɑksɪd]
蚧虫
1.
Natural enemies of coccids as a biological indicator in urban environmental monitoring and appraisal were researched.
对一些在城市环境评价和监测中可作为指示生物的蚧虫的天敌进行了调查研究,结果表明:空气污染降低了天敌昆虫对蚧虫的控制力,是导致蚧虫在污染环境中种群密度猛增的重要原因。
2.
Review and Supplement of Professor WU S 《Catalogue Insectorum Sinensium》(Family Coccidae);
中国蚧虫研究史分为早、中、近三期。
4) Scale insects
蚧虫
1.
Research progress on the chemical ecology of scale insects;
蚧虫化学生态学研究进展
2.
Comparative study of methods for isolation of genomic DNA of scale insects;
蚧虫基因组DNA不同提取方法的比较
3.
A review on waxy secretions of scale insects and their chemical composition.;
蚧虫蜡泌物的化学研究进展
5) 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。
6) 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
补充资料：吹绵蚧壳虫
(吹绵蚧)
分布于我国东北、华北、西北、华中、华东、华 南、西南;在国外分布于日本、朝鲜、菲律宾、印度 尼西亚和斯里兰卡，欧洲、非洲、北美洲也有分布。
雄成虫体长3毫米，翅长3-3.5毫米。虫体橘红色;触角11节，每节轮生长毛数根;胸部黑色;翅紫黑色;腹部8节,末节有瘤状突起2个。雌虫体长6-7毫米;身体橙黄色，椭圆形;无翅;触角们节，黑色两性虫体腹部扁平，背面隆起，上被淡黄白色蜡质物,腹端有白色蜡质囊,腹部周缘有小瘤状突起10余个并分泌遮盖身体的绵团状蜡粉，故很难见其真面日。
每年完成2-3代，多以若虫态过冬，一般4-6月间发生严重,温暖潮湿的气候有利于虫害的发生。主要危害柑橘、油桐、苹果、梨等林木和果树。
分布于我国东北、华北、西北、华中、华东、华 南、西南;在国外分布于日本、朝鲜、菲律宾、印度 尼西亚和斯里兰卡，欧洲、非洲、北美洲也有分布。
雄成虫体长3毫米，翅长3-3.5毫米。虫体橘红色;触角11节，每节轮生长毛数根;胸部黑色;翅紫黑色;腹部8节,末节有瘤状突起2个。雌虫体长6-7毫米;身体橙黄色，椭圆形;无翅;触角们节，黑色两性虫体腹部扁平，背面隆起，上被淡黄白色蜡质物,腹端有白色蜡质囊,腹部周缘有小瘤状突起10余个并分泌遮盖身体的绵团状蜡粉，故很难见其真面日。
每年完成2-3代，多以若虫态过冬，一般4-6月间发生严重,温暖潮湿的气候有利于虫害的发生。主要危害柑橘、油桐、苹果、梨等林木和果树。
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