Widiono FKM, Kusbianto DE, Arum AP, Setiyono. Effect of Extract Type and Various Concentrations of Natural Allelopathic Substances on Inhibiting Seed Germination and Growth of Cocoa Seedlings (Theobroma cacao L.). Biospecies [Internet]. 2026 Jan. 5 [cited 2026 Apr. 23];19(1):1-10. Available from: https://www.online-journal.unja.ac.id/biospecies/article/view/41173