摘要
水稻紫鞘病是一种新病害。作者将病株分为 0～ 3级，以百穗实粒干重为统计量，分别在常规早稻和单季杂交稻上进行了研究，明确了所定分级标准是适当的；紫鞘病可致早稻产量平均损失 13.6％，单季杂交稻产量平均损失 14.1％。紫鞘病主要是通过降低结实率和千粒重而造成减产的。
Rice Purple Sheath Disease is a newly emerged rice disease. The research was carried out in conventional early rice and single harvest hybrid rice by using the four grades of disease plants, meanly 0－ 3 grade, and the weights of the plump seeds of one hundred spikes were measured. The result showed that the grading standard was appropriate. Rice purple sheath disease can cause up to 13.6％ yield loss of the early rice and 14.1％ yield loss of the single harvest hybrid rice. The disease mainly reduce the setting percentage and weight per1 000 grains.
出处
《植保技术与推广》
2001年第5期3-4,共2页
Plant Protection Technology and Extension
