Ageratum (Ageratum conyzoides), a common weed in south China, has an allelopathic effect on the other plants through releasing volatilizing allelochemicals into the environment.

• 南方重要农田杂草胜红蓟(Ageratum conyzoides L.；)主要通过向环境释放挥发性化感物质来影响其它植物。