仲春,按农历节气,就是从惊蛰到清明这一个来月的时间。在我们黄淮地区,这一段时间气温上升很快,从十五六度到二十多度。水温也上升很快,达到十多度,水的表层温度大于水底层的温度。生在水中、长在水中的摇蚊幼虫在这一时期开始大量羽化,交配后的成虫飞 Zhongchun, according to lunar calendar solar terms, is from Jingzhe to Ching Ming this one to the month of time. In our Huanghuai region, the temperature has risen sharply during this period, from fifteen degrees to more than twenty degrees. Water temperature also rose rapidly to more than ten degrees, the surface temperature of water is greater than the temperature of the water bottom. Born in the water, chironomid larvae that grow in the water started to massively emerge during this period, after mating the adult fly