PROBLEM TO BE SOLVED: To provide a growth environment improvement material that is suitable for improvement of a growth environment of animal and plant, especially plant and fish.SOLUTION: A growth environment improvement material 5 includes: a first plant quality powder derived from a seed of a plant of Sapindales Meliaceae that is useful for improvement of a soil environment and a water quality environment and a second plant quality powder derived from a seed of a plant of scutellaria order sesame family that has a methylenedioxyphenyl group component. When the growth environment improvement material 5 is sprayed or mixed to/with a plant growth soil, a pest repellent effect, and an animal repellent effect of murine or mole or the like are obtained. A plant planted in a soil absorbs an active ingredient of the growth environment improvement material 5 from the root, and sucks it to the branch edge or the like. Consequently, need to spray chemical liquid or the like to a stem, branch, leaf or the like of the plant becomes few, not only a pest repellent effect in underground but also a pest repellent effect on ground can be obtained, and the growth environment of the plant can be improved as a whole.【課題】動植物、特に植物および魚類の育成環境の改善に適した育成環境改善材を提案すること。【解決手段】育成環境改善材5は、土壌環境、水質環境の改善に有効なムクロジ目センダン科の植物の種子から派生する第1植物質粉体と、メチレンジオキシフェニル基成分を含むゴマノハグサ目ゴマ科の植物の種子から派生する第2植物質粉体とを含む。育成環境改善材5を、植物育成用の土壌に散布あるいは混ぜておけば、病害虫忌避効果、ネズミ、モグラ等の動物忌避効果が得られる。土壌に植えられている植物は、その根から育成環境改善材5の有効成分を吸収し、その枝先等まで吸い上げる。この結果、植物の幹、枝、葉等に薬液等を散布する必要が少なくなり、土中の病害虫の忌避効果だけでなく、地上の病害虫の忌避効果も得ることができ、全体として植物の育成環境を改善できる。【選択図】図1
