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北京市植物保护站根据病虫越冬基数、品种布局、历史虫情、气象预报资料等综合分析,预计2017年全市粮经作物主要病虫害总体为偏轻发生,虫害重于病害,发生总面积约531.9万亩次。一、发生趋势(一)小麦病虫总体为偏轻发生,发生面积约为45万亩次,虫害重于病害,病虫害主要种类有小麦白粉病、蚜虫、吸浆虫等。1.白粉病偏轻发生,发生面积约6万亩,主要发生在房山、顺义、大
Beijing Plant Protection Station According to the comprehensive analysis of pest and disease overwintering base, species distribution, historical insects and weather forecast data, it is estimated that the main pests and diseases of grain-crops in 2017 will be light and the pests will be heavier than the diseases, with the total area of about 531.9 Mu times. First, the occurrence of trends (A) the overall occurrence of wheat pests partial light occurs, the occurrence of an area of about 450,000 mu times, pests heavier than the disease, pests and diseases are the main types of wheat powdery mildew, aphids, midge and so on. 1. Powdery mildew occurred lightly, the occurrence of an area of about 60,000 mu, mainly occurred in Fangshan, Shunyi, large