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二点委夜蛾是2005年在我省首次发现报导的新害虫,自推广小麦秸秆还田和玉米免耕播种方式以来,适宜二点委夜蛾的生态环境不断扩大,食物来源逐年增多,使二点委夜蛾虫口密度迅速积累,发生程度日益严重。夏玉米受害轻则造成植株倾斜或倒伏,影响玉米正常生长,重则造成植株新叶萎蔫枯死,特别是实行精量播种以后,危害更为严重。我县2011年个别严重田块最高危害株率达到41%。2012年个别严重田块最高危害株率达到53%。《二点委夜蛾预测预报技术规范》
It is the first time for pest insects to be reported in our province in 2005. Since the promotion of wheat straw returning and maize no-tillage sowing methods, the ecological environment of Spodoptera litura has been expanding and the source of food increased year by year. Two-point swift moth insect population density quickly accumulated, the degree of occurrence is increasingly serious. The damage of summer maize results in tilting or lodging of plants, affecting the normal growth of maize. In the meantime, the new leaves of wilts cause wilting and wilting, especially after precision sowing. My county in 2011 the most serious individual crop field the highest rate of 41%. In 2012, the highest rate of the most severely damaged individual individual plots reached 53%. “Two-point investigation of the night-long moth forecast technical specifications”