ISSN: 1659-2751

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Evaluation of the Effects of Plant Extracts on the in vitro Growth of Phytophthora palmivora Butl. and Colletotrichum gloeosporioides (Penz.) Penz. & Sacc.

Abstract

Conservation of plant biodiversity is important for several reasons, one of which is the potential use of plant extracts as alternative pesticides for the control of phytopathogenic fungi. In the present study, 28 ethanolic extracts obtained from 13 plant species were screened at a concentration of 2500 mg/L for their antifungal properties against Phytophthora palmivora (Butl.) and Colletotrichum gloeosporioides (Penz.) Penz. & Sacc., the causal agents of the cocoa black pod disease and mango anthracnose, respectively. Additionally, 64 ethanolic extracts were tested against these phytopathogenic fungi. Metalaxyl-M + mancozeb (2 %) and mancozeb (2 %) were used as the control substances for P. palmivora and C. gloeosporioides, respectively. None of the plant extracts evaluated inhibited mycelial growth of either of the plant pathogens.

Key words: Mango anthracnose, plant extracts, Colletotrichum gloeosporioides, black pod disease of cocoa, Phytophthora palmivora.

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