稻痿蚊过去多在山区发生,为害晚稻秧苗,本田极少标葱(心叶、叶鞘愈合成圆筒状葱管标出,俗称标葱)。1971年开始,突然在本田发生,标葱稻株不能抽穗,被害稻田轻者减产,重者失收。为了解决这一问题,我们开展这方面的研究,初步掌握了稻瘿蚊在从化县的发生规律、生活习性和预测预报、群防群治的有效办法。一、发生规律稻瘿蚊在从化县一年发生7—8代,第一代在3月底至4月初始见,第八代在11月中旬结束,各代历期23—29天。第一代以后各代重叠发生。以8月上旬的第五、六两代对晚稻本田分蘖为害最烈,造成损失。10月底、11月初第七、八两代以一龄幼虫入侵游草越冬。成虫晚上羽化,当晚交尾。翌日晚上8—10时产卵。每一雌虫平均产卵163粒,散 In the past, a great number of mosquitoes were found in the mountainous areas, which harbored late-season rice seedlings. Honda seldom used onions (the heart leaves and the leaf sheaths healed into a cylindrical onion tube, commonly known as the scallion). Beginning in 1971, suddenly occurred in Honda, the standard onion rice plants can not be heading, reducing the production of light rice paddy, heavy loss. In order to solve this problem, we carried out the research in this aspect and initially mastered the effective methods for the occurrence, population, habits and prediction of rice gall midge in Conghua County and the prevention and treatment of multiple diseases. First, the occurrence of law Rice gall midge in Conghua County occurs 7-8 generations a year, the first generation in late March to April initial see, the eighth generation in mid-November, each generation period of 23-29 days. After the first generation, generations overlap. In early August the fifth and sixth generation of late rice Honda tiller damage the most, resulting in losses. The end of October, the beginning of November the seventh, eight two generations of first-instar larvae invaded grassy winter. Adult emergence at night, the evening of the end of the line. 8-10 pm the next day to lay eggs. An average of 163 eggs per female, scattered