近些年来,缙云县山坡旱地小麦发生了一种“怪病”。这种“怪病”在苗期没有明显的异常表现,但从拔节期开始,植株叶片顶端发黄,剑叶小,叶肉薄、颜色浅、叶片披。抽穗后,穗小,雄蕊大部分不能伸出颖壳,许多是空壳,结实率极低,严重影响产量,以致 In recent years, a kind of “strange disease” occurred in dry land wheat in hillside of Jinyun County. This “strange disease” in the seedling stage no obvious abnormalities, but beginning from the jointing stage, the top leaves of plants yellow, small leaves, leaf thin, light color, leaves Phi. After heading, the ear is small, most of the stamens can not extend out of the husks, many of them are empty shells with a very low seed setting rate which seriously affects the yield