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玉米螟属鳞翅目,螟蛾科害虫,又叫玉米钻心虫,是玉米整个生育时期的重要害虫之一。我省每年发生两代,以幼虫危害。被害株常出现花叶,易遭风折,籽粒不满等症状,可造成严重减产。据1990年冬调查,玉米螟越冬基数为每百株2.9头,加之4—5月份气温较高,雨水多,有利于越冬幼虫的羽化,所以,今年有大发生的趋势,应抓住适期及时防治。
Corn borer Lepidoptera, Pyralidae pest, also known as corn borer, is one of the important pests throughout the corn growth period. Two generations occur each year in our province and are endangered by larvae. Mosaic plants often appear mosaic, susceptible to wind break, grain dissatisfaction and other symptoms, can cause serious cuts. According to the survey conducted in the winter of 1990, the base of overwintering corn borer was 2.9 heads per 100 plants. In addition, the relatively high temperatures and rainy days in April-May were favorable to the emergence of overwintering larvae. Therefore, this year there is a trend of great occurrence and should catch the appropriate period Timely prevention and treatment.