A method of reducing the E/Z isomerization of dimethomorph is provided, the method comprising applying dimethomorph together with fosetyl-aluminium. There is also provided a method of reducing the instability of the fungicidal activity in the presence of light of dimethomorph, the method comprising contacting dimethomorph with fosteyl-aluminium. There is further provided a method of preventing or reducing fungal infestations of plants at a locus, the method comprising applying to the locus dimethomorph and fosetyl-aluminium. A composition comprises dimethomorph and fosetyl-aluminium.在此提供了一種降低達滅芬(dimethomorph)的E/Z異構化的方法，該方法包括施用達滅芬連同福賽得(fosetyl-aluminium)。還提供了一種在光的存在下使達滅芬的殺真菌活性的不穩定性降低的方法，該方法包括使達滅芬與福賽得接觸。進一步提供了一種在場所預防或降低植物的真菌侵染的方法，該方法包括向該場所施用達滅芬和福賽得。一種組合物包括達滅芬和福賽得。
