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农作物良种在推动农业生产中愈来愈起着举足轻重的作用,但由于人们长期对农作物种子管理法观念的淡薄,常给粮食生产造成巨大损失。 近几年来玉米杂交种生产数量一直不足,一方面受自然灾害的影响,另一方面宏观控制不够,群众自某些不法分子处购买伪劣种子,因此玉米病害特别是大、小斑病大面积流行。河北省1990年气候适于病害流行,加之种植感病品种,大部分玉米减产在三成以上。5月份玉米拔节期即布满病
The crop seed has played an increasingly important role in promoting agricultural production. However, due to the long-standing concept of Crop Seed Management Law, it often causes great losses to grain production. In recent years, the production of maize hybrids has been insufficient, on the one hand by the impact of natural disasters, on the other hand, macro control is not enough, the public from some criminals to buy shoddy seeds, maize diseases, especially large and small spot epidemic . Hebei Province in 1990 climate suitable for epidemics, coupled with planting susceptible varieties, most of the corn cut in more than 30%. Corn jointing period that is full of disease in May