香蒲新害虫稻蛀茎夜蛾生物学特性研究

摘要

Typha orientalis is an excellent aquatic ornamental plant.Sesamia inferens,a borer insect,was firstly reported to damage T.orientalis in 2008.It inhabits in plant stem and results in dead heart and non-heading.This damage seriously affects ornamental value of T.orientalis.The morphology,living habits,life cycle of S.inferens were studied based on field observation and indoor rearing.The results showed that S.inferens has 4 generations per year and overwinters as larvae in stem of T.orientalis in Wuhan.The overwinterred larvae start to pupate.The adults of 4 generations emerge in the early April to mid-May,mid-June to early August,late July to late August and early September to mid-October respectively.This study is a preliminary investigation on the bionomics and damage of S.inferens,and aims to propose strategy of preventing and controling this insect.%香蒲(Typha orientalis)是一种优良的水生观赏植物.2008年首次在香蒲上发现一种钻心虫——稻蛀茎夜蛾(Sesamia inferens).该虫钻蛀香蒲茎秆,造成枯心、无法抽穗,严重影响香蒲的观赏价值.室外观察和室内饲养结果表明,稻蛀茎夜蛾在武汉地区1年发生4代,以幼虫在香蒲茎秆内越冬,次年4月上旬老熟幼虫化蛹羽化.越冬代发生在4月上旬至5月中旬,第一代发生期为6月中旬至8月上旬,第二代发生期为7月下旬至8月下旬,第三代发生期为9月上旬至10月中旬.初步研究了香蒲稻蛀茎夜蛾的生物学特性及为害情况,提出了合理的防治措施.