Abstract: The present invention relates to a composition for controlling plant-injurious organisms comprising: i. at least one active component A selected from among 1,3-dichloropropene, trichloronitromethane (chloropicrin), methyl isothiocyanate and substances which release methyl isothiocyanate, and ii. dimethyl disulfide as component B. The present invention therefore also relates to a method for controlling plant-injurious organisms, which comprises allowing the active components A jointly with dimethyl disulfide in such an amount that they bring about the destruction of plant-injurious organisms, their eggs or their larvae, on the plant-injurious organisms, their eggs, their larvae or their environment. The present invention furthermore relates to the use of the composition according to the invention for the disinfection of soils.