摘要:SummaryThe brown planthopper (BPH) is a monophagous sap-sucking pest of rice that causes immense yield loss. The rapid build-up of pesticide resistance combined with the ability of BPH populations to quickly overcome host plant resistance has rendered conventional control strategies ineffective. One of the likely ways in which BPH adapts to novel environments is by undergoing rapid shifts in its microbiome composition. To elucidate the rapid adaptation to novel environments and the contributions ofPseudomonastoward insect survival, we performedPseudomonas-specific16S rRNAgut-microbiome profiling of BPH populations. Results revealed the differential occurrence ofPseudomonasspecies in BPH populations with changing climates and geographical locations. Further, the observed variation inPseudomonasspecies composition and abundance correlated with BPH survivability. Collectively, this study, while adding to our current understanding of symbiont-mediated insect adaptation, also demonstrated a complex interplay between insect physiology and microbiome dynamics, which likely confers BPH its rapid adaptive capacity.Graphical abstractDisplay OmittedHighlights•BPH, a major pest of rice, undergoes seasonal shifts in its microbiome composition•Pseudomonassp. in BPH microbiome varied with seasons and geographical locations•Pseudomonassp. composition and abundance correlated with BPH survivability•Environment-guided microbial shifts drive rapid stress adaptations in BPHEntomology; Microbiology; Plant biology