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病害症状 1.条纹花叶型:这种类型约占病株的85％。病株显著矮化,分蘖并不增多,叶片有浓淡相间或黄绿相间的条纹,穗苞膨松呈黄白色,旗叶变黄,多数尚能抽穗,但穗形不正常,有的抽不出。 2.丛生型:约占10％。特点是分蘖增多,矮小丛生,但叶片不呈现条纹。丛生类型中,又有不同表现:(1)叶片细弱呈线状,叶片变黄,次生根显著增多;(2)叶片不变黄,次生根少而细弱,株高在10厘米以下,不能拔节;(3)叶片织细缩小,株高约20厘米,少数分蘖可以拔节抽穗;(4)叶片宽厚、浓绿、脆硬,根粗短,如鸡爪状。
Disease symptoms 1. Striped mosaic type: This type accounts for about 85% of diseased plants. Strain significantly dwarfing, tillering does not increase, leaves with shades of white or yellowish green stripes, ear bulbs yellowish white, yellow flag leaves, most still able to heading, but the spike is not normal, and some smoke pumping Out 2 cluster type: about 10%. It is characterized by an increased number of tillers and short tufts, but the leaves do not appear streaky. (2) The leaf does not turn yellow, the secondary root is small and thin, the height of the plant is under 10 cm, it can not be jointed ; (3) thin leaf tissue, plant height of about 20 cm, a few tillers can jointing heading; (4) leaves generous, dark green, crisp hard, stubby roots, such as chicken claw.