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在贵州省铜仁地区,为害烤烟的地老虎主要是小地老虎(Agrotis ypsilon Rottembe-rg)的幼虫。自4月中旬烤烟陆续移栽以后,越冬幼虫即开始为害,烟苗常年受害颇重。1981年笔者在石阡县回隆公社搞烤烟病虫害的防治。这个公社的安坨生产队周兴邦的烟田,栽后不到1个月,被咬断的烟苗达15%;回隆坳生产队刘应芳的烟田受害更重,被害率高达50%。据田间观察,从烟苗移栽到团棵,这时苗小茎嫩,小地老虎幼虫白天潜伏在烟苗脚土下,夜晚钻出来取食嫩茎,造成茎断苗倒。烟
In the Tongren area of Guizhou Province, the burrowing tiger is mainly the larva of Agrotis ypsilon Rottembe-rg. Since mid-April after transplanting flue-cured tobacco in succession, the overwintering larvae began to harm, tobacco seedlings suffered heavy perennial. In 1981 I Shiqian Hui Long commune engage in the prevention and treatment of tobacco pests and diseases. The commune An Tuo production team Zhou Xingbang tobacco fields, planted less than a month after being bitten off the tobacco up to 15%; back Long Au production team Liu Ying Fang tobacco fields more victims, the victimization rate as high as 50%. According to field observations, transplanted from the tobacco seedlings to the group tree, when the seedlings are young and tender, small tiger larvae lurking in the foot of tobacco soil during the day and night drilled to feed the tender stems, resulting in broken stem seedlings down. smoke