浅析水稻黄矮病发生与防治对策

Discussion on the occurrence and control countermeasures of rice yellow dwarf

为了提出防治水稻黄矮病的对策,对水稻黄矮病病害的发病症状、发病规律及田间表现、发病的原因进行研究。研究结果表明,水稻黄矮病是属于病毒病害,各地水稻普遍发生黄矮病。近几年来,在乐业县新化镇都有不同程度发生,一般会使水稻减产20%-80%,有的农户由于播种了感病品种,造成全部受灾,有的甚至绝收;一般来说矮秆品种易感病,高、中秆品种抗病强;病害潜育期因传毒虫数的增多而缩短,水肥管理和种植绿肥也预防和减少黄矮病害的发生。文章根据发病原因和规律提出了农业防治和化学防治对策。

In order to put forward the countermeasures of controlling rice yellow dwarf, the disease symptom, occurrence rule, field representation and occurrence reasons of this disease are studied. The study results show that this disease is a kind of virus disease and occurs widely in various regions. In recent years, this disease is occurred in Xinhua Town in different extents, which leads to yield decrease of 20% -80%, due to the infected variety, many farmer households are hit and even some of them have no harvests. Generally, short variety is susceptible while middle and long stalked varieties have stronger disease-resistance. The disease incubation period will be decreasing while the virus-transmission insects are increasing; water-fer- tilizer management and green manure planting can also prevent and decrease the disease＇ occurrence. Based on disease causes and rules, several control countermeasures in agricultural control and chemical control are put forward.