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甘蔗螟虫是为害较普遍而严重的一类害虫,以幼虫蛀入甘蔗幼苗和蔗茎为害。在甘蔗苗期入侵生长点部位,造成枯心苗;在甘蔗生长中后期入侵蔗茎,造成虫孔节,破坏蔗茎组织,使甘蔗糖分降低,且易出现风折茎或枯梢,降低产量。苗期由蔗螟造成的枯心苗率一般在10%～15%,低者2%～5%,高者可达20%～40%,减少甘蔗单位面积的有效茎。甘蔗拔节后,幼虫钻蛀蔗节,造成螟蛀节,一般为5%～10%,高者达20%～30%。甘蔗伸长期受虫害造成“死尾蔗”。防治:1.消灭越冬蔗螟、减少虫源;甘蔗收获时
Sugarcane borers are the most common and serious pests that infest sugarcane seedlings and cane stems with larvae. In the seedling stage of sugarcane invaded growth point, resulting in dead heart seedlings; cane in the late invasion of cane stems, resulting in wormhole section, destruction of cane stems, so sugar cane reduced, and prone to wind frost or shoot, reduce the yield . Seedling seedlings caused by the borer borer rate of 10% to 15% of the general, the lower 2% to 5%, the highest up to 20% to 40%, reducing the effective area of ?? sugarcane stems. After the jointing of sugarcane, larvae moth cotyledons, resulting in moth section, usually 5% to 10%, the highest of 20% to 30%. Sugarcane elongation caused by pests “dead tail cane ”. Control: 1. Eradication of wintering sugarcane, reduce insect; sugarcane harvest