eLife Assessment
This important study investigates how infestation by the small brown planthopper (Laodelphax striatellus) reshapes rice carbohydrate allocation and demonstrates that host-derived glucose enhances insect fecundity and imidacloprid tolerance, through the activation of conserved nutrient-sensing and endocrine pathways. Across extensive and complementary approaches, including plant manipulations, glucose supplementation, RNAi, pharmacological inhibition, rescue experiments, and biochemical assays, the authors provide convincing evidence that glucose activates the TOR-juvenile hormone-vitellogenin axis to promote reproduction and co-regulates GST-mediated detoxification via both TOR-JH signaling and GCL-GSH metabolism. The mechanistic framework is coherent and well supported by hierarchical validation and functional assays. Some limitations remain regarding the generality of the findings across other pest species and insecticides, and aspects of the evolutionary framing would benefit from more cautious interpretation; nonetheless, the work substantially advances our understanding of how plant-derived nutrients interface with conserved insect signaling pathways to shape fitness-related traits, and will be of broad interest to researchers studying plant-insect interactions, insect physiology, and pest management.