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据各地春季玉米螟基数调查,今年新疆、华北和黄淮部分地区基数较高,东北地区比常年明显下降,结合玉米种植和长势以及气象条件等因素综合分析,预计一代玉米螟在新疆北部大发生,新疆南部和东部、东北大部、华北和黄淮局部偏重发生,其他地区中等及以下程度发生,全国一代玉米螟发生约1.4亿亩。玉米螟越冬代成虫羽化盛期,西北、西南和东北大部较常年接近或偏晚
According to the spring corn borer base around the survey, this year in Xinjiang, North China and Huanghuai parts of the high base, the northeast region decreased significantly compared with normal years, combined with corn planting and growth and weather conditions and other factors, a comprehensive analysis of the generation of corn borers is expected to occur in northern Xinjiang In southern and eastern Xinjiang, most northeastern China, northern China and Huanghuai are heavily biased, and in other areas, moderate and below occurred, with a generation of corn borers of about 140 million mu. Overwintering generations of corn borer eclosion feather peak, most of the northwest, southwest and northeast than the perennial approaching or late