How to cite this article:
Ilondu, E.M.2020. Biopesticidal potentials of plants extracts against Cochliobolus lunatus R.R. Nelson and F.A. Haasis. Anamorph: Curvularia lunatus (Wakker) Boedgin. Journal of Biopesticides, 13(1):53-62.
Ethanolic extracts of leaves of Chromolaena odorata, Emilia sonchifolia and Tridax procumbens were evaluated for their bioactivity potentials on Cochliobolus lunatus under in-vitro condtions. To determine their bioactivity, food poisoning technique using Potato Dextrose Agar medium at concentrations of 0 to 80 mg/ml was used. Tested plant extracts significantly (P<0.05) suppressed the mycelia growth of C. lunatus with minimum inhibitory concentration of extracts as: T. procumbent (64mg/mL), E. sonchifolia (72mg/mL) and C. odonata (80mg/mL). Among the plants tested, the lowest and highest extract concentrations from leaves of T. procumbens were superior to the other extracts in its inhibitory activity. The extracts were also tested for the presence of various phytochemicals reveals the presence of alkaloids, anthraquinones, flavonoids and steroids.Totally, 8 compounds among which are Caryophyllene oxide (22.16%), Ethyl isoallocholate (20.36%), Estra-1, 3, 5(10)-trien 17, beta-ol (15.03%) and Naphthalene, decahydro-4a-methyl-1- (11.18%) were identified in C. odorata; 9 compounds among which are Phytol (27.41%), Squalene (18.68%), n-Hexadecanoic acid (17.30%) and 9,12,15-Octadecatrienoic acid (Z,Z,Z)- (15.55%) were identified in E. sonchifolia and 13 compound which include Phytol (22.87%), n-Hexadecanoic acid (15.25%), Cyclohexene,1-methyl -4- (1-methylethyl)- (14.34%) and 1,5,9,-Decatriene, 2,3,5,8-tetramethyl (10.37%) identified from T. procumbens through Gas Chromatography-Mass Spectrometry analysis of extracts. Phytol was the most abundant constituent in both E. sonchifolia (27.41%) and T. procumbens (22.87%) with Canyophyllene oxide (22.16%) in C. odorata. The portrayed potentials of these extracts indicated that they could be excellent candidates to be harnessed in the biosafety formulation of biopesticides for the control of plant diseases incited by Cochliobolus lunatus.
How to cite this article:
Ilondu, E.M.2020. Biopesticidal potentials of plants extracts against Cochliobolus lunatus R.R. Nelson and F.A. Haasis. Anamorph: Curvularia lunatus (Wakker) Boedgin. Journal of Biopesticides, 13(1):53-62.
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