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1991年富顺县高粱突发严重红叶病(农民根据症状特点而称)。当地植保部门组织农民追施肥料,喷施农药,未见收效。用普通显微镜检查,也找不出病因。经电子显微镜在放大几万倍条件下检测,才发现高粱患了病毒病,这在我省尚属首次确诊。据富顺县植保植检站调查,高粱红叶病在前几年只是零星发生。1991年因冬暖,春季蚜虫虫口密度大,红叶病发生发展较快,重病区发病率在23—51％不等。不仅造成减产,而且品质下降。主要症状表现为:高粱叶片初期出现褪绿、碎黄点,沿叶脉出现褪绿条纹,渐渐发展到叶片局部变红或出现粗细不等的红条,最后叶片、叶鞘都变成红色。有的植株表现有耳突症状或不同程度的矮化、丛生。重病株不抽穗或全株死亡。据泸州、宜宾等地反映,当地高粱也出现有类似症状。
1991 Fushun sorghum sudden severe red leaf disease (farmers according to symptoms and characteristics). The local plant protection department organized peasants to carry out top-grade fertilizers and spraying pesticides without any success. With ordinary microscope examination, can not find the cause. The electron microscope under magnification tens of thousands of times under the conditions of detection, only to find sorghum suffering from a virus disease, which is the first confirmed in our province. According to Fushun County plant protection phytosanitary survey, sorghum leaf disease in a few years ago only sporadic. In 1991 due to winter warm, spring aphid population density, rapid development of red leaf disease, severe ward incidence of 23-51%. Not only resulted in reduced production, but also a decline in quality. The main symptoms are as follows: sorghum leaves early chlorotic, broken yellow point along the veins appear chlorotic stripes gradually developed to the leaves of red or red thickness varies, the last leaves, leaf sheaths have become red. Some plants have ear symptoms or varying degrees of dwarf, tufts. Severe strains are not heading or whole plant death. According to Luzhou, Yibin and other places reflect the local sorghum also appeared similar symptoms.