SUSCEPTIBILITY AND TOLERANCE TO ROOT-KNOT NEMATODES (MELOIDOGYNE INCOGNITA) OF TELFAIRIA OCCIDENTALIS UNDER ORGANIC CONVERSION
DOI:
https://doi.org/10.33003/fjs-2020-0403-266Keywords:
Keywords: Phytonematodes, resistance, sustainable agriculture, vegetables, yield improvementAbstract
Three cultivars of Telfairia occidentalis were assessed for their resistance or otherwise to root-knot nematodes (Meloidogyne spp.) infection on the field. Seeds were extracted from the pods of the selected cultivars and planted on moist sawdust in nursery trays to raise seedlings for transplanting. The experiment was laid out in Randomized Complete Block Design and replicated thrice. Pre-plant soil samples were taken to estimate initial nematode populations. At seven days after transplanting, eggs of Meloidogyne incognita (Mi) were extracted from 60 day-old Celosia argentea and used for inoculation of the three cultivars of T. occidentalis at approximately 5000 eggs/stand. Plants were, thereafter, observed for vine length, vine girth and number of leaves from two weeks till 8 weeks after transplanting. Final soil nematode population and root gall indices were determined at 60-66 days after inoculation. Reproduction factor was determined and used along with the gall indices to rate the cultivars for resistance or susceptibility to Mi. Results showed that cultivars NHTo-020 and NHTo-030 were susceptible to root-knot nematode which implied that plants allowed nematode reproduction and also suffered yield loss while cultivar NHTo-010 was tolerant to nematode infestation meaning that nematode reproduction took place but the plant does not suffer yield loss. There was no significant (P>0.05) difference in the mean vine length and number of leaf irrespective of the inoculum while effect on the vine girth was significantly variable. The inoculated plants gave significantly better vegetative growth than the naturally infested plants which indicated genetic variability in the cultivars.
References
Abdu S.G., Adamu M.A, and Onimisi M.Y.(2018). DFT Computations of the lattice constant, stable atomic structure and the ground state energy per atom of fullerenes (c60). Science World Journal Vol 13 (No 1) 2018. www.scienceworldjournal.org, ISSN 1597-6343
ABDU, S.G. (2010). Hartree-Fock Solutions of the Hydrogen, Helium, Lithium, Beryllium and Boron atoms. Nigerian Journal of Physics Vol. 21 (2) 2010.
Aungwa F, Ahoume B.A. and Danladi E. (2017). Cohesive Energy calculation of Gallium-Arsenide and Aluminnium-Arsenide; DFT study. Journal of the Nigerian Association of Mathematical Physics, Volume 39. pp 305-312
Aungwa F, (2016). Density functional theory computation of the cohesive energies of NaCl, SiO2 and Al
Bakhtiar Ul Haq , R. Ahmed , Souraya Goumri-Said , A. Shaari & A. Afaq (2013): Electronic structure engineering of ZnO with the modified Becke–Johnson exchange versus the classical correlation potential approaches, Phase Transitions: A Multinational Journal, DOI:10.1080/01411594.2012.755183
Bakhtiar UI. HAQ, AFAQ, A., AHMED, R., & NASEEM, S. (2012). A Comprehensive DFT Study of Zinc Oxide in Different Phases. International Journal of Modern Physics C, 23(06), 1250043. DOI:10.1142/S012918311250043X
Blum, V., Gehrke R, Hanke F, Havu P, Havu V, Ren X, Reuter K, Scheffler M. (2009). “Ab initio molecular simulations with numeric atom-centered orbitals†Computer Physics Communications, 180, 2175-2196
Cohen, M.L., Chelikowsky, J. R. (1988). Electronic structure and Optical Properties of Semiconductors
Giannozzi, p. (2005). “Density functional theory for electronic structure calculations†Universit`a di Pisa, Italy.
Hellwege, K. H, Madelung, O. and Landolt B. (1982). New series, Springer Group III. Vol 17a, Berlin.
Hohenberg, P. and Kohn, W. (1964) Inhomogeneous Electron Gas, Phys. Rev., vol.136, no. 3B, pp. B864–B871,
Kohn, W. and Sham, L.J. (1965) "Self-Consistent Equations Including Exchange and Correlation Effects," Phys. Rev., vol. 140, no. 4A, pp. A1133–A1138,
Minden, H. T. (1970). Some Optical Properties of Aluminum Arsenide. Applied Physics Letters. Vol. 17, Issue 9. pg. 358-360.
Muhammad A. and Afaq A. (2015). First Principles Band-gap Calculations of 3d Transition Metals-added ZnO Materialstoday: Proceedings Volume 2, Issue 10, Part B, 2015, Pages 5128-5131, https://doi.org/10.1016/j.matpr.2015.11.009.
Perdew, J.P., Wang, Y. (1992) Accurate and simple analytic representation of the electron-gas correlation energy. Phys. Rev. B 45(23), 13244–13249.
Prateek U. and Kirti V. (2016), India International Journal of Emerging Technology in Computer Science & Electronics (IJETCSE) ISSN: 0976-1353 Volume 21.
Published
How to Cite
Issue
Section
FUDMA Journal of Sciences
