浙江省水稻病毒病的发生规律和防治

 本文总结了1965-1977年水稻病毒病主要是黑条矮缩病、普通矮缩病的发生规律和传毒昆虫传病特点等方面的调查研究工作。
水稻黑条矮缩病由灰稻虱传播。灰稻虱能把病毒自水稻传到水稻、大小麦、玉米,但难以把病毒从玉米传到其它寄主上。已证实田间早熟禾可以作为黑条矮缩病无症带毒寄主。

EPIDEMIOLOGICAL STUDY ON RICE VIRUS DISEASES AND THEIR CONTROL IN ZHEJIANG PROVINCE

Five rice virus diseascs have been found to occur in Chekiang namely,the rice dwarf, rice yellow stunt,rice yellow dwarf, transmitted by Nepho-tettix cincticeps,and the rice stripe, rice black-streaked dwarf transmitted by Loadelphax stritellus. Measures for effective control of these diseases are reported here. Plants of rice, whcat,barley and maize suffured seriously from the rice black-streaked dwarf disease virus during 1965-1967. The rice black-streaked dwarf virus, as revealed from our observation,was easily transmitted by the planthopper but not easily tansmisible from maize plants to the other of the above mentioned hosts. Although the planthopper could survive on maize plants only a short length of time,the maize crop was usually seriously infected and was damaged more than the other hosts.The vector could acquire the RBSDV from the infected Poa annua plant which showed no symptoms in field. The rice dwarf,sometimes coexisted with rice transitory yellow,was prcvailing during 1969-1973. This paper deals with some relations between RDV and its vector,especially the relation between the two major migratory periods of the vector,e. g. to early rice crop from its dormant place and later,to late rice crop from early ric ecrop,and the RDV infection.