向日葵螟种群消长动态和空间分布型
The Population Dynamics and Spatial Distribution Pattern of European Sunflower Moth, Homoeosoma nebulella
白全江等
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作者单位：内蒙古农牧业科学院植保所
中文关键词：向日葵螟；种群动态；空间分布；内蒙古
英文关键词：Sunflower Moth; Population Dynamics; Spatial Distribution Pattern; Inner Mongolia
中文摘要：为了科学指导应用播期避害、性诱剂诱捕成虫和田间释放天敌昆虫-赤眼蜂防治向日葵螟，确定最佳防治时期和选择最佳防治方法，2009年～2011年，在内蒙古巴彦淖尔市利用向日葵螟性诱剂进行了向日葵螟田间种群动态和空间分布型的研究。结果表明，向日葵螟成虫每年5月中旬始见，直到9月底，一年有两个明显的成虫蛾峰期，第一个蛾峰期出现在6月下旬至7月上旬，第二个蛾峰期在7月下旬至8月中旬，当地向日葵1年受到两代幼虫的危害，而且开花期与向日葵螟两个蛾峰期吻合度越高，向日葵受葵螟幼虫的危害越重；通过应用5种聚集度指数测定和Blackith种群聚集均数λ分析，向日葵螟成虫在田间呈聚集分布，聚集主要由向日葵螟自身行为及环境因素引起。根据成虫动态和空间分布型，可以科学指导应用播期避害、性诱剂诱捕器和释放天敌昆虫的最佳时期及方式。
英文摘要：For the purpose of determining the time of control and choosing optimal control methods, and giving a scientific instruction on applying the methods of adjusting planting date, pheromone trapping and using of Trichogramma in the field, we studied the population dynamics and spatial distribution of adult Homoeosoma nebulella by using the pheromone trap in Bayannur, Inner Mongolia from 2009 to 2011. The results showed that the emergence of Homoeosoma nebulella adults was begun at mid-July and would last till late September. There were two distinct flight peaks in a year, the first peak appeared during the time between late June to early July, and the second peak appeared during the time between late July to middle August. The local cultivated sunflower would receive damage caused by the lava of two generations, and the degrees of damage was closely related with the goodness of fit between flowering period and moth flight peak. Based on testing five indices of aggregation and analyzing the value of λ, the distribution of adult sunflower moth in the field showed aggregated pattern, and such pattern is resulted