The objective of this study is trying to use the easily obtained biomaterials to prevent the occurrence of crop diseases, especially for strawberry in Miaoli area, Taiwan. The best result of biomaterials applications will be recommended to the growers. Furthermore, to reduced the usage of chemicals and promote the development of non-synthetic resources. Different concentration of Blumea balsamifera extracts was applied to prevent strawberry anthracnose (black rot) this year. Results showed that black rot begin to appear on April, contaminated 50% of most treatments on June, and contaminated all treatment plants on July this year. The survival rate of treatment Blumea balsamifera dilute extracts 25X, 50X, 75X, 100X, and CK(water only) were 25%, 18.75%, 12.5%, 12.5% and 0%, respectively. The migration of strawberry anthracnose in different Blumea balsamifera concentration/PDA medium of 0(CK) and 10/200 were 8mm, of 20/200 and 40/200 were 7.5mm. Phytophthora fruit rot, powder mildew, and gray mold could not be prevented by application of Blumea balsamifera extracts.