亚洲玉米螟在高粱上蛀孔分布及其与产量损失的关系

Distribution of Holes Harmed by Asian Corn Borer in Sorghum and Its Relation with Yield Damage

亚洲玉米螟1、2代幼虫在辽宁省高梁上的为害蛀孔，总体以穗柄及其下1～4节上的蛀孔较多，平均分布率为55．35％。1代和2代在植株上为害，平均每株分别有0．88个和1．5个蛀孔。高粱品种ICS520和BTX623被2代幼虫为害造成减产，分别减产9．61％和9．56％。蛀孔数与产量呈极显著负相关，每株增加1个蛀孔，两个品种产量损失率分别为6．62％和5．53％。两品种对螟害显示差异不显著，相关系数未达到5％的显著标准。

The holes harmed by the Asian Corn Borer 1,2 generation on Sorghum, are distributed in the stem of ear in sorghum and it＇ s follow 1 -4 stem on total , the rate of even distribution is 55.35%. land 2 generation harmed the Plants, the average No. of the hole is 0.88 and 1.5 on per plant. Sorghum varieties ICS520 and BTX623 were harmed by the 2 generation , and their yield damages reached 9.61% and 9.56% respectively. The relation between No. of the hole and the yield damage is great negatively significant, and 1 hole increase can lead to 6.62% and 5.53% yield damage accordingly in the two varieties . The relation between the two varieties to the damage is not significant. The relative coefficient does not achieve the significant standard 5%.