The effectiveness of the egg parasitoid Trichogrammatoidea armigera Nagaraja (Hymenoptera: Trichogrammatidae) in controlling Heliocheilus albipunctella de Joannis (Lepidoptera: Noctuidae), a major insect pest of pearl millet in the Sahel was assessed during two consecutive years in Niger on-station and on-farm conditions. We found that released T. armigera were able to find and parasitize host eggs within pearl millet fields both on-station and in farmers’ fields. On-station releases of T. armigera led to an average 4.86-fold increase in T. armigera parasitism compared to control fields, where no parasitoids were released. Likewise, on-farm releases of T. armigera led to up to 5.31-fold more egg parasitism by T. armigera in release fields than in control. Our results suggest the effectiveness of T. armigera and lays the groundwork for using T. armigera in augmentative biological control of H. albipunctella in the Sahel.

中文翻译：

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释放了寄生虫的黄蜂（Trichogrammatoidea armigera（膜翅目：Trichogrammatidae））在萨赫勒地区针对小米矿工Heliocheilus albipunctella（鳞翅目：夜蛾科）释放

在尼日尔的实地和实地连续两年中，评估了卵寄生性拟南芥变种Trichogrammatoidea armigera Nagaraja（膜翅目：Trichogrammatidae）在控制萨赫勒地区珍珠粟的主要害虫Heliocheilus albipunctella de Joannis（鳞翅目：夜蛾科）中的有效性。农场条件。我们发现，释放的棉铃虫能够在养殖场和农民田间的珍珠粟田中找到并寄生寄主卵。上站发布的T.棉铃虫导致平均4.86倍的增加T.棉铃虫寄生相比控制字段，其中没有寄生被释放。同样，棉铃虫在农场的释放导致棉铃虫在释放区的卵寄生比对照高出5.31倍。我们的结果表明棉铃虫的有效性，并为使用棉铃虫在萨赫勒地区增强双歧杆菌的生物防治奠定了基础。