Compositions and methods are provided for benefiting plant growth. In particular aspects, the compositions contain a biologically pure culture of Bacillus sp. D747 strain (deposited as FERM BP-8234) and an insecticide in a formulation suitable for dissolution in a liquid fertilizer.本發明提供有益於植物生長之組合物及方法。在特定態樣中,該等組合物含有芽孢桿菌D747菌株(以FERM BP-8234寄存)之生物純培養物及殺蟲劑,呈適合於溶解於液體肥料中之調配物。