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黑龙江省现为我国玉米种植面积最大省份,年种植面积超过600万hm2,因此玉米生产成为我省农业生产的重中之重。依靠玉米高产稳产性,2012年我省粮食产量已超过“千亿斤”。但是近年来,由于气象条件多变、地理条件复杂、种植方式不合理、品种抗性差等因素,致使我省玉米年际病虫害发生面积、发生种类出现此起彼伏的现象。经过多年调查分析,这几年玉米病虫发生趋于严重的主要原因是:地形复杂、气象多变、小气候多;品种抗性
Heilongjiang Province is now China’s largest corn acreage province, with an annual acreage of more than 6 million hm2. Therefore, corn production has become the most important agricultural production in our province. Relying on the high and stable yield of corn, the grain output of our province in 2012 has exceeded “100 billion kg”. However, in recent years, due to changing meteorological conditions, complex geographical conditions, irrational planting methods, and poor variety resistance, annual occurrences of pests and diseases of maize in our province have taken place one after another. After years of investigation and analysis, in recent years, the main causes of maize pests and diseases tended to be serious are: complex terrain, changing weather, more microclimates; variety resistance