WIDIONO, Fajar Kurnia Maulid; KUSBIANTO, Dwi Erwin; ARUM, Ayu Puspita; 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, [S. l.], v. 19, n. 1, p. 1–10, 2026. DOI: 10.22437/biospecies.v19i1.41173. Disponível em: https://www.online-journal.unja.ac.id/biospecies/article/view/41173. Acesso em: 22 apr. 2026.