CABI, rue des grillons 1, 2800, Delémont, Switzerland.
Institut Sophia Agrobiotech, INRAE PACA, 400 route des chappes BP 167, 06903, Sophia Antipolis Cedex, France.
Sci Rep. 2020 Nov 5;10(1):19096. doi: 10.1038/s41598-020-76180-5.
Uncertainty about the taxonomic status and the specificity of a species commonly prevent its consideration as a candidate for biological control of pest organisms. Here we use a combination of molecular analysis and crossing experiments to gather evidence that the parasitoid wasp Ganaspis brasiliensis, a candidate for biological control of the invasive spotted wing drosophila Drosophila suzukii, is a complex of at least two cryptic species. Complementary experiments demonstrate that individuals from one genetic group readily parasitize several drosophila species regardless of their food source while individuals from the other one are almost exclusively specific to larvae feeding in ripening fruits. Because only D. suzukii attacks ripening fruits in its area of invasion, parasitoids from this second group appear to be well suited as a biological control agent. Our study demonstrates the need for a combination of biosystematics with biological and ecological investigations for the development of safe and efficient biological control programs.
对于一个通常被认为是防治害虫生物控制候选物的物种，如果其分类地位和特异性不确定，往往会阻止对其进行考虑。在这里，我们使用分子分析和杂交实验的组合来收集证据，证明寄生蜂 Ganaspis brasiliensis 是一种复杂的至少两个隐种的复合体，它是防治入侵的斑点翅果蝇 Drosophila suzukii 的生物控制候选物。补充实验表明，来自一个遗传群体的个体无论其食物来源如何，都很容易寄生几种果蝇，而来自另一个遗传群体的个体几乎专门针对在成熟果实中取食的幼虫。由于只有 D. suzukii 在其入侵区域攻击成熟果实，因此来自第二个群体的寄生蜂似乎非常适合作为生物控制剂。我们的研究表明，需要将生物系统学与生物和生态调查相结合，以制定安全有效的生物控制计划。
