开封地区花生病毒病及流行规律研究

1988—1991四年调查说明,花生矮化病毒(PSV.)引起普通花叶病害,花生条纹病毒(PStV)引起轻斑驳病害是开封花生两种主要病毒病。PSV通过花生种传,测定自花生普通花叶病株收集近4000粒种子,PSV种传率0.025％。刺槐花叶树是花生上PSV另一个初浸染源。PSV开封刺槐分离物(R_3、R_4)在鉴别寄主上反应和血清学性质上和PSV-Mi相一致,但引起花生病害症状较PSV—Mi轻。开封市农科所一带刺槐花叶病树率平均30.7％。四年病害流行程度差异显著。1988和1991年花生生长季雨量少,蚜虫发生量大,分别为PSV严重和中度流行年。1989和1990年雨水较多,蚜虫发生少,病害显著减轻。

PEANUT VIRUS DISEASES AND THEIR EPIDEMIOLOGY IN KAIFENG REGION, HENAN PROVINCE

A disease surveys made in Kaifeng Region frem 1988 to 1991 revealed that peanut common mosaic and peanut mild mottle caused by peanut stunt virus(PSV)and peanut strpe virus(PStV)respectively ware two major peanut virus diseases in the area.PSV seed transmission percentage was 0.025%in near 4000 seeds tested,which were collected from naturally infected PSV of peanut plants.A black locust mosaic tree was another primary source of PSV in peanut.The PSV black locust isolate was similar to PSV-Mi on the reactions of indicative host plants and serological property,but the peanut disease symptom caused by black locust mosaic showed light.Black locust mosaic incidence ranged from 0 to 60.7% with average 30.7%.There was significant difference in disease epidemic in 1988-1991 The rainfall had less during the peanut growth in 1988 and 1991,there were many aphid population and PSV was epidemic.