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Seeds of Veitchia merilli (Aracaceae family) contain secondary metabolites such as alkaloid, flavonoid, terpenoid, polyphenol, tannin, and quinone, which has antifungal potency. The objective of research is to investigate the effectiveness of Veitchia merilli seeds extract in controlling fusarium wilt on Shallot (Allium ascalonicum L.) caused by Fusarium oxysporum Sp. The experiment was conducted at Biochemistry Laboratory, Chemistry Program Study, Faculty of Science and Mathematic, Universitas Diponegoro and Jawa Tengah farmer field, by using Completely Randomized Design (CRD) factorial with two treatments (dry and wet) and four replications. Antifungal activity test was using Kirby Bauer disc diffusion method with various concentrations (20%, 40%, 60% and 80%). The result showed that wet extract of Veitchia merilli seeds is more potential as antifungal agent to control fusarium wilt on shallot. The effective concentration is 60%, it showed that the activity level was very strong and able to improve Shallot plant growth with plant height 7,64 cm.