化州市近十年稻飞虱重发原因浅析及防治对策

Analysis on the causes of outbreaks and control strategy of the rice planthoppers in huazhou in recent ten years

稻飞虱是造成水稻大面积减产甚至绝收的一类重要迁飞性害虫。为了改善和提高稻飞虱的监控技术水平,对广东省化州市历年稻飞虱测报资料进行总结分析。所得结果表明,近10年稻飞虱表现出明显的新特点:发生期显著提早;次害代发生重,重发世代增多;暴发频率加快,对水稻为害进一步加剧。剖析其原因,主要是气候有利、种植方式改变、抗药性增强和防治不当等。总结提出了调整防治策略,加强虫情测报和农业防治,选用正确药剂,改进施药方法等防治对策。

The rice planthopper is an important migratory pest that causes extensive and commercially significant damage to rice crops.In order to improve and enhance monitoring technology used to control this pest,we summarized and analyzed forecast data on rice planthopper outbreaks in previous years in Huazhou,Guangdong Province.The results show that some new trends have emerged over the last decade;rice plant hoppers appear significantly earlier than they previously did,the number of the secondary pests and repeat generations has increased,the frequency of outbreaks has increased,all of which cause greater damage to rice crops.These changes can be attributed to more favorable climatic conditions for planthopper growth,changes in horticultural practices,enhanced resistance to drugs and inappropriate control measures.To reduce the damage caused by this pest it is necessary to adjust control strategies,strengthen forecasting and prevention abilities and improve pesticide selection and application methods.