The present invention relates to methods for controlling rice pest invertebrates, which methods comprise applying pyrimidinium compounds of formula (I), the stereoisomers, salts, tautomers and N-oxides thereof, their mixtures and compositions comprising such compounds or mixtures, by seedling box application.本發明係關於用於控制稻有害無脊椎動物之方法,該等方法包含藉由秧苗盒施用來施用式(I)之嘧啶鎓化合物、其立體異構體、鹽、互變異構體及N-氧化物、其混合物及包含此類化合物或混合物之組合物。