Cereal Cyst Nematode (Heterodera avenae) is a pest of grain crops worldwide. This nematode is a significant problem across eastern Australia, and is detected in the Northern and Central regions of Western Australia. CCN become more problematic in areas where intensive cereal cropping occurs. CCN will only infect, feed and develop on cereals and other grasses (particularly wild oat). Non-cereal crops will not host the nematode, so are useful in rotations to limit damage caused to cereals.