2023, Vol. 11, Issue 2, Part B

In vitro studies were carried out to determine whether certain botanicals and bioagents were effective against Fusarium oxysporum f. sp. spinaciae, the organism that causes Fusarium wilt disease in spinach (Spinacia oleracea) plants. Argemone mexicana and Pithecellobium dulce (Manila tamarind) were the botanicals, and Trichoderma viride, Trichoderma harzianum, and T. hamatum were the bioagents used in this study. All plant extracts and antagonistic organisms significantly inhibited the growth of Fusarium oxysporum f. sp. spinaciae. However, T. harzianum had the greatest inhibitory effect of the antagonists, followed by T. viride and T. hamatum, which have the least suppressive effect. Pithecellobium dulce and Argemone mexicana extracts had the strongest inhibitory effects.