中文摘要：

小麦孢囊线虫病是青海省小麦青稞产区的主要病害之一。2007-2010年，采用随机取样方法对青海省小麦孢囊线虫病的发生、分布情况进行了调查。调查结果表明，小麦孢囊线虫病主要分布在青海省西宁、海东、海北、黄南、玉树、海西州6个地区，在不同海拔、不同生态区均有分布，但不同生态区以及同一生态区不同地块间发生量差异较大。垂直分布调查结果表明，同一地块中禾谷孢囊线虫主要分布在20 cm以上的土层中。

英文摘要：

Heterodera avenae （cereal cyst nematode, CCN） is one of the main diseases of wheat and barley in Qinghai Province. The occurrence and distribution of CCN was investigated in Qinghai during 2007-2010. The results of horizontal distribution showed that CCN occurred seriously in Xining, Haidong, Haibei, Huangnan, Yushu and Haixi in Qinghai. CCN could occur at different altitudes and in different ecological areas from 1 700 m to 3 900 m. The incidence rate was significantly different between different ecological regions and different plots in the same region. The results of vertical distribution showed that CCN mainly occurred in soils over 20 cm in depth in the same plots.