The agricultural chemical constituent where effectiveness is improved is offered, for example the agricultural chemical (, the insecticide or the herbicide) and also the copolymer adjuvant or the additive which is chosen from the group which consists of the maleic acid of the respective tonnage and the Acid or the copolymer of the salt which includes the itaconic acid part is included. The constituent by this invention when you compare to the agricultural chemical of the same tonnage where copolymer does not exist, brings the improvement of multiple times with effectiveness.有効性が改善された農薬組成物が提供され、農薬(例えば、殺虫剤または除草剤)と共にそれぞれの量のマレイン酸およびイタコン酸部分を含む酸または塩の共重合体から成る群から選択された共重合体補助剤または添加剤が含まれる。本発明による組成物は共重合体が存在しない同じ量の農薬に比べた場合に、有効性で複数倍の向上をもたらす。
