2011年5月,小麦收获前1个月,研究人员在摩洛哥Sas区Meknes小麦产区对长势较差的小麦植株进行病情调查。研究发现病植株生长缓慢,植株下部叶片褪绿,叶耳数量减少。根系变短,浓密,次生根增多。植株根系上无孢囊,其周围土壤中有大量孢囊。将孢囊漂浮分离,采用形态学观察及ITS DNA序列测 In May 2011, one month prior to the wheat harvest, researchers conducted disease surveys of poor growing wheat plants in the Meknes wheat area of ​​Sas in Morocco. The study found that the slow growth of diseased plants, plant lower leaves chlorotic, reduced the number of leaves. Roots shorter, thicker, secondary roots increased. There are no cysts on the plant roots and a large number of cysts in the surrounding soil. The cysts were floated and separated by morphological observation and ITS DNA sequencing