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甘肃省武威、民勤、古浪等县,近年来在谷子上发生一种新病害:病株拔节期矮缩,叶色浓绿,叶片丛生;穗颈短、穗小而硬,多不孕,几乎全包在叶丛中(图)。心叶自基部沿叶脉出现断续的条点或条纹,有的可扩展至叶尖。或在叶片的某一段明显褪绿;沿叶脉产生褐色坏死条纹,接着叶片桔黄卷曲;有的无明显条纹,但心叶失绿,叶片变薄,随后沿叶脉产生坏死条斑。为了弄清该病的病原和流行规律,以及它与当地长期发生的小麦丛矮病的关系,自1979年起,我们对此病进行了初步研究。
Wuwei, Minqin, Gulang and other counties in Gansu Province, in recent years a new disease occurred in the millet: the diseased plants at jointing dwarf, dark green leaves, leaf clusters; short panicles, spike small and hard, and more infertility , Almost all in the leaves (Figure). Heart leaf from the base along the veins intermittent stripes or stripes appear, and some can be extended to the tip. Or a certain section of the leaves chlorotic; necrotic stripes along the vein brown necrosis, followed by curly orange leaves; some without obvious stripes, but the green leaves lost, the leaves thinning, followed by necrosis of the venous leaf streaks. In order to understand the pathogen and the prevalence of the disease, and its relationship with the local long-standing cercosporosis of wheat, we have conducted a preliminary study of the disease since 1979.