The interaction of Serratia bacteria and harmonine in harlequin ladybird confers an interspecies competitive edge - Chaowei Zhang; Hang Zhou; Kang He; Yiqi Xiao; Mengyao Chen; Zhangqi Zuo; Runguo Shu; Yuhang Geng; Shuo Jin; Yang Mei; Bingbing He; Fei Li (Proceedings of the National Academy of Sciences, 2025)