集安市在１９９３年７月首次发现稻水象甲。据调查，发生虫口密度一般为７～１０头／ｍ２，重发生区达１５０头／ｍ２，发生在岭南的１０个乡镇，计７６０ｈｍ２。几年来我们对稻水象甲的为害特点和对产量的影响做了调查和试验，得出以下结果。１为害习性观察稻水象甲的成... Ji’an City, the first discovery of rice water weevil in July 1993. According to the survey, the population density of bugs is usually 7 to 10 heads / m2, and the heavy occurrence area reaches 150 heads / m2, which takes place in 10 townships in Lingnan, accounting for 760hm2. Over the past few years, we conducted a survey and test on the pest damage characteristics and impact on the yield of rice water weevil and reached the following results. 1 damage habits of rice water as a ...