稻田灰飞虱暴发原因与防治对策

Outbreak Reasons and Control Strategies of Laodelphax striatellus Fallén in Rice Field

[目的]探索引起稻田灰飞虱暴发的原因,为其防治策略的提出奠定基础。[方法]从种植结构、耕作制度、水稻品种、气候条件、抗性问题及天敌因子等几个方面分析稻田灰飞虱暴发的原因并提出相应的防治对策。[结果]我国稻区种植结构和耕作制度的演变为灰飞虱提供了充足的食料;感虫品种的大面积推广种植、灰飞虱对温度适应能力的增强、长期不合理用药引起的抗药性的提高及天敌种群数量的减少是导致稻田灰飞虱暴发的原因。防治对策方面,建议在预测预报的基础上,科学采用化学防治把灰飞虱暴发的态势压下去,并积极应用种植抗虫品种、推广翻耕麦、加强田间管理等农业防治措施。[结论]该研究为稻田灰飞虱的防治提供了科学依据。

[Objective] The aim was to explore the ouibreak reasons of Laodelphax striatellus in rice field and lay the foundation for the proposition of its control strategies. [ Method] The outbreak reasons of L. striatellus in rice field were analyzed from several aspects such as planting structure,fanning system, rice variety, climate condition, resistance and the corresponding control strategies were proposed. [ Result] The evolvement of planting structure and farming system in the rice area in China provided sufficient food for L. Striatellus ; the popularization and plant of susceptible variety in large area, the increasing adaptability of L. Striatellus to temperature, the increasing resistance and the decreasing quantity of natural enemy population caused by the irrational drug use in a long time were all the outbreak reasons of L. striatellus in rice field. The suggested control strategies were that applying chemical control scientifically to put down the outbreak trend of L. striatellus on the basis of the forecast and taking agricultural control measures such as planting resistant variety,popularizing plowing for planting wheat,strengthening field management actively. [ Conclusion ] This research provided the scientific basis for the control of L. striatellus in rice field.