冀西北农牧交错区草地螟寄生蜂及其控害作用
Species of wasp parasitioids and their roles in regulating meadow moth, Loxostege sticticalis (Lepidoptera: Pyralidae) populations in the agro-pastoral ecotone of northwestern Hebei
康爱国1** 杨立军2 张玉慧1 刘栋军1 赵志英1 张凤英1 冯丽荣1
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DOI：10.7679/j.issn.2095-1353.2015.023
作者单位：1. 河北省康保县植保植检站，康保 076650；2. 张家口市农牧局，张家口 075000
中文关键词：草地螟，寄生蜂，寄生率，控害作用
英文关键词： Loxostege sticticalis, wasp parasitoids, parasitism rate, control effect
中文摘要： 【目的】 寄生蜂是草地螟Loxostege sticticalis L.卵期和幼虫期的重要天敌，但冀西北地区的发生种类、控害作用尚不明确。【方法】 通过1997年以来历年田间调查，结合多年室内饲养。【结果】 明确了当地草地螟寄生蜂共14种，其中卵期1种，幼虫期13种，1~5龄幼虫各龄期均有不同种寄生蜂寄生，寄生蜂种类多，种群数量大，寄生率高，控害和压低草地螟种群作用显著。【结论】 该调查研究为开展草地螟预测预报，保护利用天敌资源和综合治理提供了科学依据。
英文摘要： [Objectives] Wasp parasitoids are important natural enemies of the eggs and larvae of the meadow moth, Loxostege sticticalis L., but the roles of different parasitoid wasps in regulating meadow moth populations in northwestern Hebei are not well understood. [Methods] Field investigations were conducted every year from 1997 to 2013 and combined with laboratory studies. [Results] 14 wasp species, including one egg parasitoid and 13 larval parasitoids, were found can parasitize meadow moths in northwestern Hebei. Meadow moth has different wasp parasitoids at each larval instar. Wasp parasitoids are characterized by rich species, large quantity and high parasitism rates and can significantly decrease the meadow moth population in this area. [Conclusion] This research not only provides scientific evidence for the forecasting and integral pest management of the meadow moth, but also highlights the importance of natural enemies in the control of this pest.