虫口密度,population density
1)population density虫口密度
1.Relationship between the number of resin exits caused by Hylobitelus xiaoi larvae and their meanpopulation 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 andpopulation 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 thepopulation 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
英文短句/例句
1.Relationships among Cyrtotrachelus buqueti larval density and wormhole number and bamboo shoot damage degree长足大竹象虫口密度与虫孔数、竹笋受害率的关系
2.densely/thickly/sparsely/thinly populated regions人口密度大[稠密/密度小/稀疏]的地区.
3.Tenasserim had a very sparse population.丹那沙林人口密度不大。
4.areas with high densities of immigrant populatio移民人口密度大的地区
5.low - density urban areas.人口密度小的农村地区
6.The worm"s cyst is the same density as the cerebrospinal fluid.寄生虫的外壳和脑髓液的密度一样
7.The High Density Cultivation of Brachionus Plicatilis;褶皱臂尾轮虫高密度培育技术的研究
8.Effects of Media and Temperature on Population Growth of Chilodonella cyprini不同温度及培养液对鲤斜管虫种群密度的影响
9.Relationship between the gall density of erythrina gall wasp and swelling degree of infested parts of Erythrina variegata var. orientalis刺桐姬小蜂虫瘿密度与刺桐受害肿大程度关系
10.There are obvious linear relationship between individual weight and adult density, between adult density and amount of lac secreted by per Kerria lacca on double logarithmic coordinate axis.⑷ 紫胶蚧成虫密度与虫体重、个体泌胶量在双对数图上直线关系明显。
11.India be one of the countries that have great denseness in population印度是人口高度密集的国家之一
12.Furthermore, the sequential sampling method for its density estimation was proposed.提出了越冬成虫密度估计的序贯抽样方案。
13.AN EASY METHODFOR POPULATION DENSITY ESTIMATION OF DENDROLIMUS TABULAEFORMIS PUPA油松毛虫蛹种群密度简易估计方法的研究
14.Study on Egg Parasitoids of Masson Pine Caterpillar (Dendrolimus Punctatus Walker) under Different Host Population Densities马尾松毛虫不同密度下卵期寄生性天敌的研究
15.Effects of Density and Plant Pruning on Yield Distribution of Hybrid Bt Cotton密度与整枝对抗虫杂交棉产量分布的影响
16.Analysis of the questionnaire on mosquito density in Beijing city and Olympic venues北京市及奥运场馆蚊虫密度问卷调查分析
17.Garlic Sets the Density of Hybrid Cotton to Choose The Best Briefing the Pilot Study蒜套杂交抗虫棉最佳密度选择试验研究简报
18.Influence of Nymph Density on Fecundity of Corythucha ciliata(Say)悬铃木方翅网蝽若虫密度对其繁殖力的影响
相关短句/例句
insect density虫口密度
1.Lowinsect density,low attacked trees rate,higher crowded degree;Ⅱ.通过对30块样地资料的聚类分析,将平陆县锈色粒肩天牛为害分布类型划分为5类:第 类,低虫口密度、低被害株率、较高拥挤度;第 类,较高虫口密度、较高被害株率、高拥挤度;第 类,虫口密度、中等被害株率、较低拥挤度;第 类,较低虫口密度、较低被害株率、低拥挤度;第 类,高虫口密度、高被害株率、中拥挤度。
3)density of pine caterpillars松毛虫虫口密度
4)larval density幼虫密度
1.To investigate the effect oflarval 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 andlarval 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)scale density蚧虫密度
1.The results show that in polluted areas thescale 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。
6)nymphal density若虫密度
1.Effects ofnymphal 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
延伸阅读
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
