草地螟的寄生蝇种类、寄生方式及其对寄主种群的调控作用

寄生蝇是草地螟的重要寄生天敌之一，其寄生率多数情况下高于寄生蜂，表现出很大的控害潜力。本文通过对文献资料的分析，结合多年来对草地螟寄生蝇的研究结果，对草地螟的寄生蝇种类、寄生方式、优势种及其控制作用，保护利用进行了总结和评述。草地螟寄生蝇种类丰富，目前已知有22个种，在草地螟的主要发生为害区都有分布，其寄生方式多样，寄主范围广，很多种类为多主寄生。优势种有4种：伞裙追寄蝇Exorista civilis Rondani，双斑截尾寄蝇Nemorilla maculosa Meigen，黑袍卷须寄蝇Clemelis pullata Meigen和草地追寄蝇Exorista pratensis Robincau Uesvoidy。这些优势种对控制当代草地螟的作用有限，而对控制下一代草地螟的发生为害起着重要的作用。本文最后讨论了草地螟寄生蝇的保护和利用前景。

The tachinids parasitizing on the meadow moth, Loxostege sticticalis (Lepidoptera: Pyralidae): species, types of parasitism and their roles in controlling the host population

Tachinids are among the important endoparasitoids for the meadow moth, Loxostege sticticalis (Lepidoptera: Pyralidae). In most cases, the parasitism rate of tachinids is far higher than that of hymenopterous parasitoids, which exhibits a great potential to regulate the population of meadow moth. In this paper, the tachinid species parasitizing on the meadow moth, types of parasitism, the dominant species and their roles in controlling the host population as well as their protection and utilization were reviewed by combining the results derived from field investigations and literatures. The species of tachinid parasitoids for the meadow moth were as many as 22 species, which were widely distributed along with the meadow moth and most of them were with a broad host range of other phytophagous species. Four dominant species were recorded: Exorista civilis Rondani, Nemorilla maculosa Meigen, Clemelis pullata Meigen, and Exorista pratensis Robincau-Uesvoidy. It was found that the controlling effect of these tachinid species on the current generation of meadow moth is limited; however, they could play an important role in controlling the next generation of meadow moth. The conservation and utilization of the tachinid parasitoids were also discussed based on these prospects.