稻田病虫害生态防控模式及其在西南地区的应用

Ecological control of rice pest/disease and application in Southwest China

  • 摘要: 近年来, 由于受气候、种植制度、栽培方式、生态环境和品种多样化等因素的综合影响, 水稻病虫害危害程度加重, 防控压力增大; 同时, 由于当前我国农村劳动力的匮乏以及文化水平的限制, 病虫害防治过分依赖化学药剂, 造成环境污染, 威胁食品安全。基于此, 通过对传统优秀农业植保技术的挖掘、提高以及现代科学技术的发展、应用, 一些以农业、物理和生物防治为关键技术的生态综合防控模式正被广泛应用并进行示范推广, 逐渐显现出病虫害防治和减少农药施用的优势。本文总结并梳理了当前西南稻作区主要的稻田病虫害生态防控模式及其应用成效, 结果发现: 杂糯间作的品种多样性防控模式可有效控制稻瘟病, 但增加了劳动量; 稻鸭共作的生物多样性防控模式可有效控制纹枯病、稻飞虱、叶蝉、福寿螺和杂草, 但对技术水平和市场条件要求较高。此外, 对昆虫性信息素、生物农药、植物性驱虫剂和天敌保护利用技术等生物防控技术的优缺点进行了总结和分析。

     

    Abstract: Climate change, planting systems, crop cultivations, environment pollution and other factors have aggravated the degree of harm caused by rice diseases and insect pests. To that end, the prevention and control of rice diseases/pests have become increasingly important for rice production operations. Due, however, to labor scarcity in villages and cultural limitations, chemicals have been increasingly used to control rice diseases/pests. This has in turn caused not only environmental pollution, but also threatened food safety. In the face of the above conditions, excellent traditional agricultural plant protection technologies have been invented and improved to control rice diseases/pests in line with modern science and technology. Thus in the practice of rice production in South-west China, comprehensive eco-technologies have been widely used at extension demonstrations besides the use of chemicals to control rice diseases/pests. These eco-technologies cut across agricultural, physical and biological bases. Compared with chemical control, comprehensive eco-technologies have the advantage of controlling rice diseases/pests and protecting the environment. Thus this paper reviewed and summarized main eco-technologies in Southwestern China used to control rice diseases/pests. The paper also analyzed application modes and effects of these technologies. The review noted that it was effective to control rice blast by intercrop-ping hybrid rice with glutinous rice under high labor conditions. Rice-duck farming controlled rice sheath blight and rice planthop-pers, but at the same time needed high tech and market conditions. Notwithstanding, some effective biotechnologies such as sex phe-romone, biopesticide, etc. existed in the paddy fields of Southwest China.

     

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