秋春两季感染BYDV对小麦产量的影响及小麦黄矮病的流行分析

本文通过秋季和春季分别对１６个冬小麦品种接种，研究不同时期感染ＢＹＤＶ对小麦产量的影响，结果表明，无论秋季还是春季感染ＢＹＤＶ病毒，都对小麦的千粒重、产量、生物学产量有严重影响，秋季染病的小麦，其病情指数比春季感染的高出约一倍，感病越早，损失越严重。通过观察小麦黄矮病在田间的增长动态，认为小麦黄矮病在陇东旱塬的流行程度取决于秋季染病和春季染病的叠加结果

EFFECT OF BARLEY YELLOW DWARF VIRUS(BYDV)IN AUTUMN AND SPRING INFECTION ON THE YIELD OF WHEAT AND EPIDEMIOLOGY OF BYDV

This paper studies the effect of BYDV in different seasonal infection on the yield wheat byseparate inoculations of BYDV to 16 winter wheat varieties in autumn and spring, The resultsshowed that BYDV both in autumn and in spring infection had severe effects on the thousand ker-nel weight,the yield and the biological yield.The disease index of infected wheat in autumn in-creased by about 100% as compared with that of infected wheat in spring. The earlier the infec-tion time,the severer the yield loss would be, According to the observations of the epidemiologyof wheat yellow dwarf disease in the fields,the authors suggest that the occurrence degree of thedisease in Eastern Gansu is determined by the accumulation of infection in autumn and spring.