魔虫口入 Slither
蝗虫口器装片 Mouthpart of Grasshopper W.M
虫口基数 initial population number
虫口模型 worm number
蚜虫口 apid population
卷棘口吸虫 [无脊椎] Echinostoma revolutum ; Echistoms revolutum
圆圃棘口吸虫 Echinostoma hortense
美洲板口线虫 Necator americanus ; Necator
十二指肠钩口线虫 [无脊椎] Ancylostoma duodenale ; Ancylostoma
板口线虫病 [内科] necatoriasis ; necatorosis
第类，高虫口密度、高被害株率、中拥挤度。
High insect density, high attacked trees rate, middle crowded degree.
碎麦诱捕器在不同虫口密度下诱捕效果明显不同。
Lure effects of trap with creaked wheat depend on different population density.
在相同误差水平，理论抽样数随平均虫口密度的增加而减少。
Under some level of error, the theoretical sampling number should decrease as the average density of the mite increases.
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