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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—2011年,在内蒙古巴彦淖尔市利用向日葵螟Homoeosoma nebulellum(Denis et Schiffermüller)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1个蛾峰期出现在6月下旬至7月上旬,第2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。
In order to guide the application of sowing and sheltering science scientifically, sexual lure trapping adults and fields to release natural enemies - Trichogramma control sunflower stem borer, to determine the best control period and choose the best prevention and treatment methods, 2009-2011, Bayannaoer City in Inner Mongolia The field population dynamics and spatial distribution of sunflower borer were studied using sexual attractants of Homoeosoma nebulellum (Denis et Schiffermüller). The results showed that adults of sunflower borer begin to emerge from mid-May of each year until the end of September, and there are two obvious adult moths in one year, the first moth peak appears in late June to early July, and the second moth peak During the period from late July to mid-August, the local sunflower was endangered by two generations of larvae for one year, and the higher coincidence degree of the two moths during flowering and sunflower borer was, the heavier the damage of sunflower was. Analysis of the degree of aggregation index and the Blackith population aggregation mean λ analysis, the sunflower borer adults were aggregated distribution in the field, aggregation mainly by the sunflower stem borer behavior and environmental factors. According to the dynamic and spatial distribution patterns of adults, the best time and mode of sowing, sexual attractant trapping and releasing natural enemy insects can be scientifically applied.