随着雌蜂密度增加，寄主蛹的寄生率和平均每头寄生蛹中的子蜂数相应提高，但平均每雌产的子蜂数则逐渐减少。
With an increase in female parasitiod density, there was a corresponding increase in pupal parasitization rate and the average number of progeny per parasitized pupae.
增加奇主密度可增加黄腹潜蝇茧蜂的寄生数和穿刺致死数。
The number of larvae parasitized and attacked increased with increase of larvae density.
对中国野生葡萄资源的17个种或变种，共73个株系根围寄生线虫的种类和密度进行了系统的调查与鉴定。
Species and densities of parasitic nematodes were systematically investigated from the rhizosphere soil of 73 clones which belong to 17 species of wild grapes native to China.
设计中考虑到电流密度问题，寄生问题，对称性问题，天线效应以及ESD保护等。
Considering the issues such as current density, parasitic, symmetry, antenna effect and ESD.
相关性分析的结果表明上一代的虫口密度可以影响下一代害虫卵期的寄生性天敌的数量。
The result of correlation analysis showed that the caterpillar densities of previous generation could affect the parasitism rates of following generation.
其聚集分布的强度随寄生虫种群平均密度的增加而降低。
The degree of the overdispersion decreases with the increase ofthe mean density.
毛头鬼伞、粗皮侧耳能有效降低植物寄生线虫的个体密度，提高腐生线虫的个体密度。
P. ostreatus and C. comatus could decrease the individual density of plant parasites, increase the the individual density of saprophytic nematodes.
毛头鬼伞、粗皮侧耳能有效降低植物寄生线虫的个体密度，提高腐生线虫的个体密度。
P. ostreatus and C. comatus could decrease the individual density of plant parasites, increase the the individual density of saprophytic nematodes.
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