英语翻译Sampling methodsSamplings were performed usually every t

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英语翻译
Sampling methods
Samplings were performed usually every two weeks from April to October 1997.Ten leaves per 2 replicates were collected in each sampling on natural,pure and mixed hedgerows.The leaves were transported to the laboratory where densities of Phytoseiidae and of the most common mite families (e.g.,Tetranychidae,Tenuipalpidae,Eriophyidae,Tydeidae,Winterschmidtiidae) were evaluated under a binocular microscope.Tomonitor vagrant eriophyoids (Eriophyoidea),five different areas of the leaf blade,measuring approximately 1 cm2 each,were explored (25×).Mite species were identified using a phase-contrast microscope.The mean leaf surface of the different plant species ranged from 17.8 cm2 (field maple) to 40.3 cm2 (hazel).Mite densities (except eriophyoids) were expressed as the number of motile forms per 17.8 cm2of leaf surface.

取样方法
从1997年4月到9月,通常每两星期取一次样.
取样应包含自然的,纯合的,和混合的三种灌木树篱.每次取样,每两个相同的
样品需要收集10片叶子,
采样得到的叶子将被送往实验室,在双筒显微镜下,可以对植缨螨科,以及最常
见的螨科（如叶螨科,细须螨科,瘿螨科）的密度进行评估.
为了监测蔓生的节蜱总科,需要对叶片的五个不同区域进行研究,每片区域面积
约为一平方厘米.螨的种类可以通过相位差显微镜来鉴别.
不同种类植物,叶片表面积的平均值,从17.8cm2（欧亚灌木枫）到40.3cm2（榛
属植物）不等.
螨的密度（除节蜱总科外）用每17.8cm2叶片表面活动的螨的数量来表示.

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