Integrating Metabolomics and Behavioral Assays to Identify 4-Hydroxyphenylacetic Acid as a Candidate Component of Sex Pheromone in Invasive <i>Pomacea canaliculata</i>

<i>Pomacea canaliculata</i>, a destructive invasive species, threatens agriculture and ecosystems globally. Environmentally safe control methods like sex pheromones remain unexplored for this snail. Integrating behavioral tests, metabolomics, and field trials, we identified key chemical ecology traits. Male <i>P. canaliculata</i> were strongly attracted to virgin female-conditioned water, specifically its medium ultrafiltrate, but unresponsive to male or mated female samples. Nontargeted metabolomics of 135 up-regulated metabolites in virgin females pinpointed 4-hydroxyphenylacetic acid as a critical attractant. Behavioral assays confirmed its unique efficacy in luring males, while structural analogs failed, indicating specificity. Field trials validated its practical trapping potential, with optimal performance at a concentration of 1 mol/L. This study identifies 4-hydroxyphenylacetic acid as a candidate component of sex pheromone in <i>P. canaliculata</i>, offering a targeted strategy for eco-friendly population control. These findings advance invasive species management by enabling pheromone-based traps, reducing reliance on chemical pesticides and mitigating ecological impacts.