6th International Young Scientist Congress (IYSC-2021) and workshop on Intellectual Property Rights on 8th and 9th May 2021.  10th International Science Congress (ISC-2020) will be Postponed to 8th and 9th December 2021 Due to COVID-19.  International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Field control of bacterial speck of tomato using some plant extracts

Author Affiliations

  • 1Department of Plant Science and Biotechnology, Federal University Oye Ekiti, Ekiti State, Nigeria
  • 2Department of Plant Science and Biotechnology, Federal University Oye Ekiti, Ekiti State, Nigeria
  • 3Department of Agronomy, Federal University, Keshere, Gombe State, Nigeria
  • 4Department of Applied Sciences, Osun State Polytechnic, Iree
  • 5Department of Crop Protection, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
  • 6Department of Crop Protection, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
  • 7Department of Crop Protection, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria

Int. Res. J. Biological Sci., Volume 9, Issue (2), Pages 1-5, May,10 (2020)


One of the diseases of tomato, an important vegetable crop, that is known everywhere in every part of the world is Bacterial speck (Pseudomonas syringae pvtomato. Chemical control has not been very effective and unsafe for the environment hence, the need for alternative methods of controlling the disease. This study accessed the effect of plant extracts on the frequency and ruthlessness of bacterial speck of tomato on two tomato cultivars (Roma VF and Gboko). Experimental construction and design was in form of a Randomized Complete Block Design (RCBD) having three (3) replicates. Plant extracts from Moring a oliefera, Azadirachta indica, Chromolaena odorata at 12.5% w/v and 25% w/v concentrations were applied. Data were subjected to Analysis of Variance (ANOVA) and means separated by the Duncan's Multiple Range Test (p &


  1. Popoola, A. R., Ganiyu, A.S. Babatunde,O.A., and Ayo - John,E.I. (2011)., Effect of tillage methods, varieties and compost amendments on bacterial leaf spot, leaf speck and fruit yield of two tomato varieties., Nig. J. For Plant Protection. 25, 127-38.
  2. Wokoma, E.C.W. (2008)., Preliminary report on disease of tomatoes in Choba, Rivers State., J. Appl. Sci. Environ. 12(3), 178-121.
  3. Dimphna, N. E. (2016)., Isolation and Identification of Fungi Associated with Postharvest Decay of Lycopersicum esculentum M. sold in Abakaliki, Nigeria., IOSR J. Agr. and Vet. Sci., 9 (7), 87-89.
  4. Ganiyu, S. A., Popoola A.R., Owolade O. F., and Fatona K.A. (2017)., Control of common bacterial blight disease of cowpea (Vigna unguiculata [L.] Walp) with certain plant extracts in Abeokuta, Nigeria., J. Crop Improvement, 31, (3), 280-288.
  5. Shenge, K. C., Mabagala R. B., and Mortensen C. N. (2010)., Current status of bacterial -speck and -spot diseases of tomato-growing regions of Tanzania., J. Agr. Extension and Rural Development, 2(5), 84-88.
  6. Yunis, H., Y. Bashan, Y. Okon, and Y. Henis (1980)., Weather Dependence Yield Losses and Control of Bacterial Speck of Tomato Caused by Pseudomonas syringae pv. tomato., Plant Disease, 64, 937 - 939.
  7. Schneider, R. W. and Grogan R. G. (1977)., Bacterial speck of tomato: sources of inoculum and establishment of a resident population., Phytopathology, 67, 388-394.
  8. Martins, S. J., & Alves, E. (2014)., Essential oils for the control of bacterial speck in tomato crop., African Journal of Agricultural Research, 9(34), 2624-2629.
  9. Kotan, R., DadasogluF., Kordali, S., Cakir, A. Dikbas, N.and Cakmakci R. (2007)., Antibacterial activity of essential oils extracted from some medicinal plants, Carvacrol and thymol on Xanthomonas axonopodispv. vesicatoria (Dodge) Dye causes bacterial spot disease on pepper and tomato., J. Agr Tech., 3(2), 299-306.
  10. Mariana C.G., Carlos,H.G. Martins,J.M. Taís,M.B. Luís, V. and Sacramento S. (2016)., Phytochemical screening of Azadirachta indica A. Juss. for antimicrobial activity., Afr. J. Microbiol. Res., 11(4), 117-122.
  11. Jalpa R., Pooja, M.and Sumitra C. (2016)., Effect of decoction extracts of some medicinal plantson calcium oxalate crystalliization., Asian J. Pharm and Clinical Res., 9(4), 70-76.
  12. Amadioha, A. C. (2003)., A bacterial biological agent. in: manual of industrial microbiology and biotechnology., 2nd ed., pp.642-650. A. L. Demain and J. E. Davies, (eds). American Soc. Microbiol Press, Washington, D. C.
  13. Opara, E. U., and Wokocha R.C. (2008)., Efficacy of some plant extracts on the in vitro and in-vivo control of Xanthomonas camestris arbricola., Plant Diseases., 94, 271
  14. Varma, J. and Dubey N. K. (1999)., Prospective of botanical and microbial products as pesticides of tomorrow., Current Sci., 76(2), 172-179.
  15. Claudette, R. K., Kathryn, L. H. Sara, M. L. Jackie H. M., Lisa, G. Gavin, R. Anupama, K. Ary, A. H. and Vincent P. (2013)., Ecological evidence links adverse biological effects of pesticide and metal contamination in an urban Australian watershed., J. Applied Ecology., 51(2). doi.org/10.1111/1365-2664.12211.
  16. Prakash, M. and Karmegam N. (2012)., In-vitro antibacterial activity of certain plant extracts againstplant disease causing bacteria isolated from citrus plant., Int. J. Current Microbiol. Applied Sci., 1(1), 1-11.
  17. Ruchi T., Amit, K.V. Sandip, C. Kuldeep, D. andShoor V.S. (2014)., Neem (Azadirachta indica) and its potential for safeguarding health of animals and humans: A review., J. Biol. Sci., 14(2), 110-123.
  18. James, W.C. (1971)., A manual of assessment keys for plant diseases., Saint Paul MN. APS Press.
  19. Ganiyu, S. A., Popoola, A.R. Babalola, O.A. and Ayo-John E.I. (2008)., Effects of compost amendments on bacterial diseases and yield of tomato., In Organic agriculture and the millennium development goals: Proceedings of the 1st West African Summit and 4th National Conference on Organic Agriculture, 17-21 November 2008, Abeokuta, Nigeria, eds I. O. O. Aiyelaagbe, M. T. Adetunji, and S. A. Osei, 180-83. Nigeria: WANOART Publishers.
  20. Enikuomehin, O.A. (2005)., Cercospora leaf spot disease management in sesame (Sesamum indicum) with plant extracts., J. Tropic Agr., 43(1-2), 21-25.
  21. Hostettman, K., and Wolfender J. (1997)., The search for biologically active secondary metabolites., Pesticide Science, 51, 471-82.
  22. Popoola, A. R., Ganiyu, S. A. Awotide, O. G. and OduwayeA. O. (2016)., Plant extracts as seed dressing to control bacterial blight of long-staple cotton seedlings., J. Crop Improvement, 30(1), 84-94.