影响禾谷缢管蚜自然种群变动的关键因素研究  

Studies on key influencing factors on the dynamics of natural population of Rhopalosiphum padi (Linnaeus)

作　　者：李素娟[1] 武予清[1] 李巧丝[1] 刘爱芝[1] 李鸿胜 

机构地区：[1]河南省农科院植保所,郑州450002 [2]河南省伏阳县农业局

出　　处：《植物保护》2000年第3期11-14,共4页Plant Protection

基　　金：国家科技攻关项目! (96 - 0 0 5 - 0 1 - 0 2 )

摘　　要：试验表明 ,影响禾谷缢管蚜自然种群变动的主要因素是气候和天敌。低龄若蚜主要受风雨的影响 ,高龄若蚜和成蚜主要受天敌和风雨共同作用。天敌主要为七星瓢虫和食蚜蝇。禾谷缢管蚜是典型的γ对策昆虫 ,具有较高的内禀增殖率 ,又具有较高的死亡率。种群的变动受自身密度的影响 。Studies on the life table showed that key influencing factors on the dynamics of natural population of Rhopalosiphum padi Linnaeus were weather and natural enemies. The density of young nymph could be reduced more than 22.6%-50.0% in strong wind and heavy raining days. The main factors for influencing the old nymph and adults were natural enemies, mainly Coccinella septempunctata and hover flies. R. padi is a typical r strategist insect which has high mortality as well as high intransic increase rate. Therefore, the study indicated that the dynamics of the population was also influenced by its own density.

关 键 词：禾谷缢管蚜 自然种群 小麦害虫 气候 天敌 

分 类 号：S435.122.2[农业科学—农业昆虫与害虫防治]