近年来,上海市郊区个别地方,玉米螟危害棉花比红铃虫严重,因此,1975—1978年曾对玉米螟繁殖数量和各虫态存活率进行观察,现将结果报道如下。一、观察方法在钵头内泥土上铺一层草纸,中间扦一根铅丝,上挂10%蜜糖水湿棉絮,用提灯罩(直径12厘米)罩上,把刚羽化的雌、雄成虫各一头,放入罩内使其交配产卵,罩上口 In recent years, some places in Shanghai suburbs, corn borer harm cotton bollworm than serious, therefore, 1975-1978 the number of corn borer propagation and the survival rate of each insect was observed, the results reported below. First, the observation method Put a layer of grass paper in the soil inside the pot, the middle skewer a lead wire, wet 10% honey moistened cotton wool, with a lantern cover (diameter 12 cm) cover, the newly females of the male and female adult One, put it in the hood to mate and spawn, mouth covered