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玉米中后期病虫害总体将偏重发生
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玉米中后期病虫害总体将偏重发生
7月24日,全国农业技术推广服务中心(全国农技中心)发布了玉米中后期病虫害发生趋势预报。综合分析预计2020年玉米中后期病虫害总体偏重发生,略重于常年,接近上年。危害盛期北方玉米种植区大部在7月下旬至8月底,南方玉米种植区可持续到10月底。预计2020年下半年全国玉米病害发生2.6亿亩(1,733万公顷)次,同比减少7%。预计大斑病在东北地区西部偏重发生,东北大部、华北北部、西北东部、西南局部中等发生,累计发生面积将达6,300万亩(420万公顷);小斑病在黄淮南部、西南局部中等发生,累计发生面...
Fungicides China News (Chinese version) 202007
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