Different Plant Extracts against Phytophthora infestans (Mont.) de Bary in Tomato in Vitro - American Journal of Plant Sciences

AJPS > Vol.10 No.4, April 2019

American Journal of Plant Sciences

Volume 10, Issue 4 (April 2019)

ISSN Print: 2158-2742 ISSN Online: 2158-2750

Google-based Impact Factor: 1.20 Citations h5-index & Ranking

Different Plant Extracts against Phytophthora infestans (Mont.) de Bary in Tomato in Vitro ()

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DOI: 10.4236/ajps.2019.104050 987 Downloads 3,111 Views Citations

Author(s)

Rachel I. Ndala^1,2*, Ernest Rashid Mbega², Patrick A. Ndakidemi¹

Affiliation(s)

¹School of Life Sciences and Bio-Engineering, The Nelson Mandela African Institution of Science and Technology (NM-AIST), Arusha, Tanzania.
²Centre for Research, Agricultural Advancement, Teaching Excellence and Sustainability in Food and Nutrition Security (CREATES-FNS), Arusha, Tanzania.

ABSTRACT

The objective of this study was to evaluate the efficacy of plant extracts in managing late blight disease in tomato, in vitro. Crude extracts were from Plectranthus barbatus, Tephrosia vogelii, Sphaeranthus suaveolens and Lantana camara. These were compared with commercial formulations Otiva fungicide and untreated as negative control. Their effectiveness was determined by measuring the inhibition zone of the mycelial growth of the pathogen recorded in triplicate at 48 hours and 72 hours. The results showed significant differences (P ≤ 0.001) among the extracting solvents on percentage inhibition of Phytophthora infestans. Methanol was superior in inhibiting the growth of mycelial growth of P. infestans as compared with ethyl acetate. Furthermore, all plants tested showed antifungal activity against P. infestans. The P. barbatus, L. camara and S. suaveolens were comparable with the commercial fungicide in inhibiting the growth of P. infestans. In this study, T. vogelii extract showed poor results in inhibiting the mycelial growth of P. infestans as compared with other plant extracts. Also, it was observed that, there were significant (P < 0.05) interactive effects between solvent and plant extracts and between incubation time and plant extracts.

KEYWORDS

Tomato, Late Blight Disease, Plant Extracts, Inhitionpercentage

Share and Cite:

Ndala, R. , Mbega, E. and Ndakidemi, P. (2019) Different Plant Extracts against Phytophthora infestans (Mont.) de Bary in Tomato in Vitro. American Journal of Plant Sciences, 10, 698-708. doi: 10.4236/ajps.2019.104050.

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[3]	Comparative Metabolomic Profiling of Compatible and Incompatible Interactions Between Potato and Phytophthora infestans
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[4]	Phytochemical study and anti-oomycete activity of Ageratum conyzoides Linnaeus
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