Cereal cyst nematode (CCN) Cereal cyst nematode (fact sheet) at Soilquality.org (syn. cereal root eelworm and oat cyst nematode) is a plant pest caused by Heterodera avenae, Heterodera bifenestra, Heterodera hordecalis, Heterodera latipons, and Heterodera gotland in the following hosts: Avena sativa, Hordeum vulgare, Secale cereale, Triticum aestivum, and × Triticosecale. Cereal cyst nematode at Grain Genes
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