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蔗根锯天牛Dorysthenes(paraphus)granu-losus(Thomson)在广西南部、广东海南岛、云南弥勒县蔗区均发现为害。蔗蔸受害率一般为5—10％,重者30—40％。我们对它进行了初步研究,现简报如下。 一、形态特征 成虫 体长33—50毫米,棕红色,头及触角基部棕黑,头部前额中央凹陷,上颚发达,向内弯勾。下颚须末节最长,端部宽。触角基瘤宽大,彼此接近,12节。雌虫触角长达鞘翅中部,光滑无毛,第5—10节外端角突出;雄虫触角较长,第3—6节腹面散生粒状突。前胸背板中部稍隆起,具细密刻点,两侧缘有锯齿3枚。鞘翅宽于前胸,具纵隆线两条。
Dorysthenes (paraphus) granu-losus (Thomson) were found to be harmful in sugarcane fields in southern Guangxi, Hainan, Guangdong and Maitreya, Yunnan. Cane 蔸 victimization rate is generally 5-10%, weight 30-40%. We conducted a preliminary study of it and are briefing as follows. First, morphological characteristics Adult body length 33-50 mm, reddish brown, head and antennae base black, forehead central depression, developed upper jaw, inward hook. The lower jaw should be the longest section, wide end. Broadleaf antenna, close to each other, 12 knots. Females antennae up to the middle of the coleoptera, smooth glabrous, the first 5-10 end of the outer corner of the prominent; male antennae longer, Section 3-6 ventral granular granuloma. A slight uplift of the central part of the front breastplate, with minute carved spots, serrated on both sides of the edge of three. Coleoptera wider than the chest, with two vertical lines.