论文部分内容阅读
新疆西南部喀什地区1954年在喀什农场的玉米上发现一种病害,继之年年均有不同程度的发生,尤以外来品种为重,每年普遍发病,本地品种则轻微感染。轻病区发病率为1—12%,重病区30—40%,高达90%以上,甚至个别品种在植株生长中期全部死亡而绝种。病状:中、上部叶片的基部至尖端显出与叶脉平行淡黄色细条纹。条纹分疏纹、密纹两种:疏纹呈淡黄绿色,排列稀疏,在平行脉的两侧或与叶脉重合,条纹间的距离宽达3—6毫米,而中间
In Kashgar in southwestern Xinjiang, a disease was found on maize in Kashgar Farm in 1954, followed by varying degrees from year to year, especially in exotic breeds, with a common incidence each year and a slight infection with native breeds. The incidence of light ward 1-12%, 30-40% of seriously ill areas, up to 90% or more, and even individual species in the mid-plant all died and died. Symptoms: The base of the middle and upper leaves showed a thin yellowish stripe parallel to the veins. Sparse stripe stripes, two kinds of dense: sparse yellowish green, arranged in sparse, parallel vein on both sides or coincide with the veins, stripe width of 3-6 mm wide, while the middle