论文部分内容阅读
The cereal cyst nematode (Heterodera avenae) is the most important nematode on wheat and cereal crops in China.The occurrance and distribution of Heterodera spp.were investigated by random sampling method from 19 counties of Shandong province.The specie was identified as Heterodera avenae with the morphological and rDNA-ITS analysis..