Chinese study shows harvesters spread cereal cyst nematodes
Combine harvesters used in multiple areas can aid the spread of cereal cyst nematodes ( Heterodera avenae), according to a study conducted for China's Department of Crop Farming Administration. Cereal cyst nematodes first appeared in the Chinese province of Hubei in 1987, and from there spread to other wheat-producing areas such as Henan, Shandong, Hebei and Anhui. In Henan province, over the past two to three years, the disease has caused wheat production to decrease 20-30%, and even up to 70% in fields most severely affected. Some 933,333 ha of farmland is affected by cereal cyst nematodes in Henan province, with repeat occurrences affecting nearly 26,667 ha.