The predatory ladybird, Adalia bipunctata (Linnaeus) (Coleoptera: Coccinellidae), is a polyphagous species that primarily feeds on aphids. In this study, we assessed the demographic parameters and antioxidant activities of A. bipunctata individuals that were fed on Sitobion avenae (Fabricius) (Hemiptera: Aphididae) reared on wheat treated with Plant Growth-Promoting Rhizobacteria (PGPRs) (Biofarm and Probio96) and micronutrients (Librel Zinc and Alpha-Iron). The results showed that the shortest preadult period of A. bipunctata was recorded for individuals reared under Probio96 and Biofarm treatments. Additionally, the highest values of intrinsic rate (r) and net reproductive rate (R 0) of the predator were recorded under the Probio96 treatment, while the lowest values were observed with Alpha-Iron. The lowest activity levels of catalase, oxidized/ reduced thiols ratio, peroxidase, and superoxide dismutase were found in 4th instar larvae. In contrast, the lowest antioxidant activities, except ascorbate peroxidase, were observed in adults. These findings were attributed to aphids reared on wheat fertilized with Probio96. It can be concluded that combining host plant resistance with Plant Growth-Promoting Rhizobacteria and biological control may offer an effective strategy for the integrated management of aphids.
