Identification of pathotypes of four populations of cereal cyst nematode in the border on Shandong, Henan and Anhui provinces Relationships between population densities of the cereal cyst nematode, Heterodera avenae, and yield losses of winter wheat in Hebei Province The effects of nutrient elements on the hatching of cyst and vitality of secondary stage juvenile of cereal cyst nematode Identification of cyst nematode in alpine meadow steppe, Gansu rDNA-ITS restriction fragment length polymorphism of cereal cyst nematodes in some regions of Qinghai, Shaanxi and Henan Province,China CHARACTERISTICS OF CEREAL CYST NEMATODE POPULATION IN ACTIVE PERIOD IN HUBEI Development and Identification of Wheat Lines H3714 and H4058 Resistant to Cereal Cyst Nematode Isolation and identification of fungal parasites of cyst nematodes in Heterodera avenae group Identification on the species of cereal cyst nematode from Northern Henan and Southern Hebei, China