水稻黑条矮缩病暴发原因及防治对策

水稻黑条矮缩病是由灰稻虱传毒引起发病。冬暖夏凉，耕作制度改变，有利于灰稻虱越冬越夏，传毒媒介数量上升，感病品种种植面积大，致使晚稻黑条矮缩病大暴发。补灰稻虱若虫高峰期，用5％锐劲特SC或10%砒虫啉WP等防治有较好的防效。

Causes of Rice Black-streaked Dwarf Outbreak And Its Control Measures

Rice black-streaked dwarf is a viral disease transmitted by the planthopper, Laodelphax striatellus. Warm winter and cool summer conditions in recent years are favourable for the planthopper vector overwintering and oversummering. Rising of the vector population and popularizing of the disease-susceptible varieties are considered as the causes of recent out breaks of rice black-streaked dwarf. Spraying of 5%Regent aqueous suspension concentrate or 10% imidacloprid wettable powder at the high peak of nymph population of the planthopper had a very high control effect.