赤眼卵蜂為常用於農業之寄生性生物防治天敵，寄生於鱗翅目的卵。臺灣田間的赤眼卵蜂根據分子鑑定，區分出四種赤眼卵蜂，其中二種已知者為螟黃赤眼卵蜂(Trichogramma chilonis)與玉米螟赤眼卵蜂(T. ostriniae)，另有二未知種尚無法根據分子資料鑑定出種類。本研究根據生物種概念，確認此二種赤眼卵蜂是否具生殖隔離為新種，結果助於瞭解赤眼卵蜂種類多樣性及未來生物防治之利用。田間調查發現四種赤眼卵蜂共域分布現象，本研究欲了解種間競爭取代情形，單種或多種天敵釋放的權衡，未來可供天敵防治策略之參考。近緣種可能透過雜交方式，達到競爭取代之目的，本研究將針對四種赤眼卵蜂進行種間雜交試驗，檢測基因滲入情形，探討生殖干擾對種間競爭取代及種化事件的影響。
Trichogramma are endoparasitoids of lepidopteran eggs and commonly used in biological control of natural enemies. According to the morphological and molecular characterization, there are four species of Trichogramma in Taiwan. Two species of Trichogramma were known, Trichogramma chilonis and T. ostriniae, and the other two species were unknown. This study will test the biological species concept and confirm whether these two species of Trichogramma are new species. The results will help to understand the species diversity of Trichogramma and the future use of biological control. In the field investigation, the distribution of four species of Trichogramma was found to sympatric distribution. This research will study the interspecific competition. The trade-off of the release of single or multiple natural enemies, this study will be used as a reference for the prevention and control of natural enemies in the future. The relative species may achieve the purpose of competition replacement through hybridization. In this study, interspecific hybridization experiments were carried out on four species of Trichogramma to detect the gene introgression, and to explore the effects of reproductive interference on interspecific competition replacement and speciation events.
