宁夏不同种植区燕麦红叶病发生情况比较研究

Comparison of Occurrence of Barley Yellow Dwarf Virus in Different Planting Regions of Oat

为了明确燕麦红叶病在宁夏不同种植区及燕麦不同生育时期的发生特点,对宁夏南部山区和北部灌区2个燕麦种植区的7个燕麦品种在抽穗期、灌浆期和乳熟期的红叶病发生情况进行了调查研究。结果表明:在南部山区燕麦种植区,牧王的发病率和病情指数最低;在北部灌区燕麦种植区,牧王、甜燕1号2个品种的发病率和病情指数均为最低。分析表明红叶病发生的病情指数与燕麦生育时期相关,各燕麦品种随生育时期的推移红叶病发生不断加重,乳熟期发病最为严重,病情指数在39.72~54.18。

In order to clarify the incidence of BYDV(Barley yellow dwarf virus)at different planting region and growth stages of oat in Ningxia.This study investigated the occurrence of BYDV at the heading stage,grain filling stage and milk maturity stage of 7 oat varieties in southern mountainous area and northern irrigation area.The results showed that the incidence and disease index of Muwang were the lowest in the southern mountainous area;the incidence and disease index of Muwang and Tianyan No.1 were the lowest in the northern irrigation area;the incidence of BYDV was closely related to the growth stage of oat,the incidence and disease index of BYDV of the oat varieties increased with the prolonging growth stage and reached the highest at the milk maturity stage,the average severity was between 39.72~54.18.