论文部分内容阅读
本文报道1979～1982年福建水稻东格鲁病发生、传播、流行和防治的研究结果。田间调查和人工接种表明:此病主要发生于我省晚季稻田;病田产量一般损失3～7成,甚至完全绝收;病害可由黑尾叶蝉、二点黑尾叶蝉和电光叶蝉传播,但以二点黑尾叶蝉的传病力最强。介体昆虫的传病能力,与其饲毒和接种取食时间长短及温度高低有关,而与昆虫产地关系不大。病害流行主要与下列因素有关:(1)6～7月份的介体昆虫数量及其带毒虫比率;(2)晚季水稻播种、插秧时间的迟早;(3)感病品种的栽植面积。采用压缩感病品种,改种、扩种抗病品种;调整播种插秧时间,避过最感病的苗期和返青分蘖期的介体昆虫迁飞高峰,以及关键时间铲除田间杂草,扑灭介体昆虫等几项综合防治措施,可在大面积范围内有效控制病害的流行。
This article reports the results of the research on the occurrence, transmission, epidemic and control of tungluk in Fujian from 1979 to 1982. Field investigation and artificial inoculation indicated that the disease mainly occurred in the late season paddy fields in our province. The yield of the disease field was generally 3 to 7% or even completely lost. The disease could be transmitted by the black-tailed leafhopper, the black-tailed leafhopper and the electric leafhopper , But the two-point leafhopper is the most powerful. The ability of vector-mediated insects to transmit disease is related to the feeding time, the feeding time and the temperature, but not to the origin of insects. The prevalence of the disease is mainly related to the following factors: (1) the number of mediator insects from June to July and the ratio of entomopathogenic insects; (2) the sooner or later planting and transplanting of late-season rice; and (3) the planting area of susceptible cultivars. Sowing the seedlings in the most susceptible stage and returning to the tillering stage, the migratory peak of the mediator insects and the elimination of field weeds in the key time, Body insects and several other comprehensive prevention and control measures can be effectively controlled within a large area of disease prevalence.