各地经验,防治二代粘虫,确保麦套玉米不受危害,必须做好“三查”。(一)查成虫。据饶阳、宁晋等县1978—1980年观测,一代成虫始见期在5月中旬,盛发期在5月下旬国—6月上旬。查成虫的目的是指导田间查卵诱卵和掌握二代粘虫的发生主力。方法是选择长势好,有代表性的麦田设20瓦黑光灯和一组杨树枝把诱测成虫。杨树 Experience from all over to prevent and control second-generation armyworms and ensure wheat-corn is not harmed and must be properly checked. (A) check into worms. According to Raoyang, Ning Jin County 1978-1980 observation, the first generation of adults began in mid-May, Sheng-fa period in late May - early June. Check the purpose of adult worms is to guide the field ovarization eggs and grasp the main force of the second generation of armyworms. The method is to choose a good growing, representative wheat field set 20 watts black light and a group of poplar branches to induce adults. Poplar