我所看到的国内外文献报导,二化螟越冬代幼虫的化蛹部位,都是在稻草(茎稈)和稻根内化蛹。但在实际工作中,还发现有在稻根外部化蛹的。 1964年5月24日,检查二化螟发育进度时,从中晚稻田间拔起的稻根中,发现有两头活蛹,分别紧夹在两丛稻根基部软松的泥土上。其“根外”化蛹占总蛹数 The domestic and foreign literatures that I have seen reported that the pupae of the overwintering adult larvae of the rice stem borer are internally pupal in the straw (stems) and the rice roots. However, in actual work, we found that there are pupae outside the rice root. May 24, 1964, check the progress of the development of Chilo suppressalis, rice from the middle and late rice paddy uprooted two live pupae were found, respectively, in the two groups of rice clinging to the loose roots of soft soil. The “root” pupae accounted for the total number of pupae