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近几年随着小麦产量的提高和耕作制度的改变,小麦病虫草害呈加重发生趋势,其主要特点:一是常发性病虫草害居高不下,种类多,发生重,范围广;二是流行性和暴发性病虫草害发生频率增加,使防治工作措手不及;三是有些新传入和新兴起的有害生物上升为优势种群,防治难度加大;四是多种有害生物交织发生,且传播速度快。针对上述情况,特就小麦起身至拔节期,小麦病虫草害发生与
In recent years, with the improvement of wheat yield and farming system changes, wheat pests and diseases are aggravating trend, the main features: First, the frequent occurrence of pests and diseases of high incidence, variety, heavy, wide range; Second is Epidemic and outbreak of pest and weed damage increased, so that prevention and control work by surprise; Third, some newly introduced and emerging pests rose to the dominant population, prevention and control more difficult; Fourth, a variety of pests intertwined, and the propagation speed fast. In view of the above situation, especially on the wheat rose to jointing stage, wheat pests and diseases occur