Qian Zhang, Long Yang, Min‐Long Li, Yong‐Qiang Liu, Yan‐Hui Lu
Methods to trace source habitats and movement of parasitic natural enemies in agroecosystems are limited. This study demonstrates that stable carbon isotope analysis offers a valuable new method for revealing the movement of Microplitis mediator (Haliday) (Hymenoptera: Braconidae), a larval endoparasitoid of Helicoverpa armigera Hübner (Lepidoptera: Noctuidae), between C 3 and C 4 plants.Results indicate that M. mediator with δ 13 C values of lower than À22‰ originate from a C 3 plant, whereas those with δ 13…
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