管侧沟茧蜂发育历期、发育起点温度及有效积温研究

Study on Developmental Durations, Accumulated Temperature and Developmental Zero of Microplitis tuberculifer Wesmael

管侧沟茧蜂是寄生甜菜夜蛾和粘虫等害虫的低龄幼虫寄生蜂。本文以粘虫幼虫为繁殖寄主,对管侧沟茧蜂的发育起点温度、有效积温及发育历期进行了研究,试验结果表明:管侧沟茧蜂卵-结茧的发育起点温度为12 1℃,有效积温为115 15日度,茧-羽化的发育起点温度为8 47℃,有效积温为99 47日度。发育历期随温度的升高而缩短,该寄生蜂最适发育温度为23～27℃,在25℃条件下全世代发育历期为14 64d。

Microplitis tuberculiter (wesmael) can parasitize in the young larvae of Spodoptera exigua(Hübner) and Pseudaletia separata (Walker). Researches on developmental durations, accumulated temperature and developmental zero of Microplitis tuberculifer Wesmael by Pseudaletia separata (Walker). The result showed that developmental zero and accumulated temperature of egg-larva, pupae were 12.1 ℃ and 115.15 day-degree, 8.47 ℃ and 99.47 day-degree. With the increasing of temperature its developmental duration become shorter. Its developmental temperature was 23-27 ℃. Under 25 ℃ condition developmental durations of one generation was 14.64 day.