Affiliation:
1. Department of Crop Science, Faculty of Agronomy and Agricultural Sciences, University of Dschang , P.O. Box 222 , Dschang , Cameroon
Abstract
Abstract
A field experiment was conducted to investigate the effect of aqueous and ethanolic extracts of neem (Azadirachta indica A. JUSS) and garlic (Allium sativum L.) against Cercospora leaf spot (CLS) disease of groundnut (Arachis hypogaea L.). A split plot design using two exotic (“fleur” 11 var., 65-13 var.) and one local (village var.) variety of groundnut as the main factor and ten treatments comprising one negative control (sterile distilled water), one positive control (fungicide: spavozeb) and eight phyto-extracts replicated three times was applied. Treatments were applied to plots at 45, 60, 75 and 90 days after planting (DAP). Results showed that CLS disease incidence ranged between 66.67% and 88.89% at 65 DAP for 10% ethanolic extract of garlic and 20% aqueous extract of garlic, respectively. Disease severity was lowest for 20% ethanolic extracts of neem seeds (14.74%) and garlic bulb (14.99%) at 65 DAP. Yield obtained from treatments of ethanolic extracts of garlic (3.62 t ha−1) was significantly higher (p < 0.05) than the control (2.40 t ha−1) but comparable to the spavozeb treatment (3.09 t ha−1). Exotic varieties were more productive (3.13 and 3.43 t ha−1) than the more resistant local variety (2.67 t ha−1).
Subject
General Agricultural and Biological Sciences
Reference37 articles.
1. Adjou SE, Soumanou MM. Efficacité des extraits de plantes dans la lutte contre les moisissures toxinogènes isolées sur l’arachide en post- récolte au Bénin. J Appl Biosci. 2013;70:5555–66. 10.4314/jab.v70i1.98755. French.
2. Ahmad L, Pathak N, Zaidi RK. Antifungal potential of plant extracts against seed-borne fungi isolated from barley seeds (Hordeum vulgare L.). J Plant Pathol Microb. 2016;7(5):1000350.
3. Akinbode OA, Ikotun T. Evaluation of some bioagents and botanicals in in vitro control of Colletotrichum destructivum. Afr J Biotechnol. 2008;7:868–72.
4. Akongo E. Influence d'azote et de son fractionnement sur le rendement de la morelle noire (Solanum scabrum Mill) sur un oxisol des hauts plateaux de l'Ouest Cameroun. Mémoire de fin d étude d ingénieur Agronome. Université de Dschang, FASA; 2010. p. 78.
5. Ambang Z, Dooh JPN, Essono G, Bekolo N, Chewachong G, Asseng CC. Effect of Thevetia peruviana seeds extract on in vitro growth of four strains of Phytophthora megakarya. Plant Omics J. 2010;3(3):70–6.