【摘要】 为掌握红彩真猎对斜纹夜蛾蝽捕食能力的强弱,采用培养皿和自制仪器装置目测观察,在室内条件下研究了红彩真猎蝽成虫和1~5龄若虫对斜纹夜蛾幼虫的捕食行为以及红彩真猎蝽1~5龄若虫及成虫的水平爬行能力和垂直攀爬能力。结果表明,成虫的取食时间随斜纹夜蛾幼虫龄期的增加而增加,4龄和5龄若虫的取食时间较其它龄期若虫的取食时间长。成虫的爬行时间随斜纹夜蛾幼虫龄期的增加而减少。随着红彩真猎蝽龄期的增加第一次刺入时间逐渐减少。随着红彩真猎蝽龄期的增加最长取食时间逐渐减少,取食量逐渐增多,红彩真猎蝽成虫和4-5龄高龄若虫的捕食能力最强。红彩真猎蝽5龄若虫及成虫的扩散能力很强,龄期越大室内扩散能力越强。这些研究结果对制定烟田释放红彩真猎蝽防治烟草害虫控制策略具有重要的理论意义。更多还原

【Abstract】 In order to learn the ability of predation of H. fuscipes to Spodopteralitura, the Spodopteralitura-attacking behavior of H. fuscipesadults and 1^st-5^th instar larvae, horizontal and vertical walking capacity of H. fuscipes larvae(i.e.,1st through 5^th) and adults were examined by culture dish and self-apparatus in laboratory. Results showed that time for starved adults to feed S. lituranymphs increased as host nymphs developed. 4^th-instar and 5^th-larvae of H. fuscipesspent had more time in feeding than other larvae instar. With the number of larval instars increasing, the time spent on walking decreased for H. fuscipesadults. With the number of instars of H. fuscipes increasing, first pierce time and the longest feeding time of H. fuscipes were decreased. With the number of instars of H. fuscipes increasing, feeding amount of H. fuscipes was increased. Predatory capacity of H. fuscipes adults and 4^th-5^th instar larvae were the strongest of all instars. H. fuscipes adults and 5^th instar larvae had strong dispersal capacity. In the lab, the dispersal capacity of H. fuscipes increased as assassin bug instar developed. These research results had important theoretical significance for formulating strategy of releasing assassin bug to control these important pests.更多还原