The present invention relates to a composition comprising a first salt which contains a first anionic pesticide (A1 ) and a cationic polyamine (B) and a second salt which contains a second anionic pesticide (A2) and a cationic polyamine (B) wherein both salts contain the same cationic polyamine (B) and wherein the cationic polyamine comprises at least two amino groups. It further relates to a method for preparing said comprising the step of contacting the first salt and the second salt. In addition the invention relates to a method of combating harmful insects and/or phytopathogenic fungi which comprises contacting plants seed soil or habitat of plants in or on which the harmful insects and/or phytopathogenic fungi are growing or may grow plants seed or soil to be protected from attack or infestation by said harmful insects and/or phytopathogenic fungi with an effective amount of said composition. It also relates to a method of controlling undesired vegetation which comprises allowing a herbicidal effective amount of said composition to act on plants their habitat or on seed of said plants. Finally the invention relates to seed comprising said composition.
