Staff

Ajayi, Emmanuel Oluwakayode (Dr)

Rank:

Chief Research Officer

Area of specialization:

Crop Physiology

Official Email:

ajayi.oluwakayode@nihort.gov.ng

Qualification:

Ph.D.

Brief Profile

I am a Chief Research Officer in the Vegetable programme.

Publications

JOURNAL

  1. E. O.; Okonji, C. J.; Ayanlola, O. T.; Olofintoye, T. A. J. and Oyelowo D. O. (2020). Improving growth and yield of okra by intercropping with varying populations of legumes. Journal of Agricultural Sciences. (In press)
  2. J. Okonji, E. O. Ajayi, B. D. Adewale, S. O. Oikeh, M. W. Akash & A. J.Ogundeji (2020): Performance of upland rice as influenced by varying row ratios in rice/okra intercrop, Journal of Crop Improvement, DOI: 10.1080/15427528.2020.1762272
  3. Ajayi, E.O; Okelye, K.A; Akinfasoye, J.A; Sakariyawo, O.S; Awotide, O.G and Ariyo, O.C. (2019). Determination of optimum sowing dates for grain amaranth (Amaranth spp.) accessions in northern guinea savanna agro-ecological zone of Nigeria. Nigerian Journal of Horticultural Science. 24, Issue 3: 80-90
  4. Akinfasoye, J.A; Fagbayide, J.A and Ajayi, E.O (2019). Residual effect of organic fertilizer rates on the growth and yield of long cayenne pepper. Nigerian Journal of Horticultural Science. 24, Issue 3: 66-71
  5. Okonji, C.J; Alonge, G.S and Ajayi, E.O (2019). Analysis of vegetable production among rural household in Ekiti State, Nigeria. Nigerian Journal of Horticultural Science. 24, Issue 2: 109-120
  6. Akinfasoye, J.A; Fagbayide, J.A; Ajayi, E.O and Idowu-Agida, O.O. (2019). Response of long cayenne pepper to organic fertilizers in two agro-ecological zones of Nigeria. Nigerian Journal of Horticultural Science. 24, Issue 2: 76-84
  7. Akinfasoye, J.A; Fagbayide, J.A; Ajayi, E.O and Ogunniyan, D.J (2018). Comparative effect of organic fertilizers on growth and yield of long cayenne pepper in two agro-ecological zones of Nigeria. Journal of Agricultural Sciences. 63, No. 1: 1-10
  8. Ajayi, E.O; Adeoye, I.B and Shittu O.A (2017). Economic analysis of intercropping okra with legumes. Journal of Agricultural Sciences. 62, No. 2: 193-202
  9. Ajayi E.O; Sakariyamo O.S; Okeleye K.A. and Ariyo O.J. (2016). Preliminary evaluation of grain amaranth (Amaranthus spp.) accessions for drought tolerance by multivariate technique. Agronomski Glasnik. 78 (5-6): 231-250.
  10. Bakare, O.K; Oyedeji, E.O and Ajayi, E.O (2015). Fungitoxicity of aqueous leaf extracts of Carica papaya and Acalypha swilkesiana on seed borne pathogens of Sesame (Sesanum indicum) Nigerian Journal of Horticultural Science. 20:110 – 114
  11. Akinyemi, O.S; Adebayo, O.S; Adesegun E.A. and Ajayi E.O. (2014). Influence of Inorganic Fertilizer and Spacing on the Performance of Ginger Zingiber officinale Rose. J. Biol. Chem. Research. 31(2): 730-739
  12. Adesegun, E.A; Akintokun, A.K; Ajayi, E.O; Adebayo, O.S and Enikuomehin, O.A (2013). Sclerotium rolfsii management in Tomato using Aframomum melegueta, Ocimum gratissimum and Cymbopogon citrates. Archives of Phytopathology and Plant Protection DOI:10.1080/03235408.2012.750816. 46(6): 732-740.
  13. Akinfasoye, J.A; Ajayi, O; Askira, M.Sand Oladigbolu, A.A. (2013). Comparative effect of three organic fertilizer sources and rates on the growth and yield of long cayenne pepper (Capsicum frutecense). Continental J. Agronomy 7 (2): 1 – 9, 2013.
  14. Christopher J. Okonji, Emmanuel O. Ajayi, Kehinde A. Okeleye, Akeem A. Oyekanmi and Suleiman O. Sakariyawo (2013). Correlation analysis of rice (Oryza sativa) growth, yield and its yield attributes in an intercrop with cassava and melon. The African Journal of Plant Science and Biotechnology. 7(1): 27-31.
  15. Adesegun, E.A; Ajayi, E.O; Adebayo, O.S; Akintokun, A.K and Enikuomehin, O.A (2012). Effect of Ocimum gratissimum and Aframomum melegueta extracts on the growth of Sclerotium rolfsii International Journal of Plant Pathology 3(2):74-81
  16. Akinfasoye, J. A; Ogunniyan, D. J and Ajayi, E.O (2012) Agronomic Performance of Rain-fed and Irrigated Commercial Tomato Hybrids. International Journal of Vegetable Science. 19(1): 26-33.
  17. IdowuAgida, O.O and Ajayi, E.O (2012). Variation of plant characters among long caynne pepper. International Journal of Vegetable Science. 18: 319–327
  18. IdowuAgida, O.O; Ogunniyan, D.J. and Ajayi, E.O (2012). Flowering and fruiting behaviour of long caynne pepper. International Journal of Plant Breeding and Genetics. 6(4): 228-237.
  19. Okonji J. Christopher, Emmanuel Ajayi, Okeleye A. Kehinde, Oyekanmi A. Akeem, Aderibigbe G. Sunday and Sakariyawo O. Suleiman (2012). Upland rice based intercropping system among farmers in selected villages in Ogun State in South west of Nigeria. Journal of Agricultural Extension and Rural Development Vol. 4(17), pp. 456-464.
  20. Oladayo O. Idowu-Agida, Dotun J. Ogunniyan and Emmanuel O. Ajayi (2012). Screening long cayenne pepper (Capsicum frutescens) accessions collected from Southwest Nigeria for agronomic performance. The African Journal of Plant Science and Biotechnology. 6(1): 50-55
  21. Olaleye, O., Ajayi, E.O., Oduntan, A.O., Akinpelu E. A. and T.J. Olofintoye (2012): Residual effect of mucuna on the growth of sesame (Sesamum radiatum Schum) at different plant spacing. AGRONOMC GLASNIK 5-6: 243-252
  22. Ajayi, O; Modupeola, T.O; Tairu, F.M; Fagbayide, J.A. and Idowu-Agida, O.O (2011). Correlation analysis of oil content and its components in Jatropha curcas L. collected from five agro-ecologies in Nigeria. Seed Science and Biotechnology. 5(1): 50-52.
  23. Akinfasoye, J. Akindele, Dotun J. Ogunniyan and Emmanuel O. Ajayi (2011). Phenotypic Relationship among Agronomic Characters of Commercial Tomato (Lycopersicum esculentum) Hybrids. American-Eurasian Journal of Agronomy, 4 (1): 17-22.
  24. Modupeola, T.O; Fagbayide, J.A. and Ajayi, E.O. (2011). Comparative analysis of Oil, Nutrient content and Chemical properties of Jatropha curcas obtained from five Agro-Ecologies of Nigeria. Obeche Journal 29(2): 350-353
  25. Modupeola, T.O; J.A. Fagbayide; O. Ajayi and O.O. Idowu-Agida (2011). Variations in physical characteristics and oil content of Jatropha curcas at five agro-ecologies of Nigeria. International Journal of Tropical Agriculture and Food Systems, 5(1): 22 – 25
  26. Ajayi, E.O; Okeleye, K.A; Olowe, V.I.O. and Okonji, C.J (2010). Effects of time of intercropping melon with rice on growth and yield of component crops. Journal of Applied Agricultural Research. 2010, 2: 83-88
  27. Okonji, C.J; Okeleye, K.A; Olowe, V.I.O and Ajayi, E.O. (2007). Potentials of intercropping rice (Oryza sativa) and cassava (Manihot esculenta Crantz.) of different morphotypes in the transition zone of South West Nigeria. International Journal of Agricultural Research 2(5): Pp 476-482.

CONFERENCE PROCEEDINGS:

  1. Ajayi, E.O., Okonji, C. J., Olofin T.F  and Ayanlola, O. T (2019). Effects of different sources of plant based fertilizer on the growth and yield of cucumber. In: Adesina, J. M., Iwala, O. S., Kekere, O. and Ajayi, A. J. Ajayi E. O. and Idowu-Agida O.O. (Eds.). Horticultural Production for Sustainable Economic Growth and Development. Book of Proceedings of the 37th Annual Conference of Horticultural Society of Nigeria, Faculty of Agricultural Technology, Rufus Giwa Polytechnic, Owo, Ondo State Nigeria. 18th – 22nd November, 2019. Pp. 340 -344.
  2. Azeez, S. O., Ajayi, E. O. and Lawal, O. I. (2019). Agronomic evaluation of three varieties of cucumber in two agro-ecologies of Nigeria. In: Adesina, J. M., Iwala, O. S., Kekere, O. and Ajayi, A. J. Ajayi E. O. and Idowu-Agida O.O. (Eds.). Horticultural Production for Sustainable Economic Growth and Development. Book of Proceedings of the 37th Annual Conference of Horticultural Society of Nigeria, Faculty of Agricultural Technology, Rufus Giwa Polytechnic, Owo, Ondo State Nigeria. 18th – 22nd November, 2019. Pp. 793-797.
  3. Okonji C. J., Alonge, G. S. and Ajayi, E, O. (2019). Analysis of Vegetable Production among Rural Household in Ekiti State, Nigeria.  In: Adesina, J. M., Iwala, O. S., Kekere, O. and Ajayi, A. J. Ajayi E. O. and Idowu-Agida O.O. (Eds.). Horticultural Production for Sustainable Economic Growth and Development. Book of Proceedings of the 37th Annual Conference of Horticultural Society of Nigeria, Faculty of Agricultural Technology, Rufus Giwa Polytechnic, Owo, Ondo State Nigeria. 18th – 22nd November, 2019. Pp. 128-132
  4. Taiwo, S. O., Akinfasoye, J. A., Idowu, O. O., Oke, A. O., Ajayi, E. O., Idowu-Agida, O. O., Akinpelu, O. A., Otunla, C.A., Oke, K. E., Oladigbolu, A. A., Adebiyi, O. E., Oladosu, B. O., Pitan, A. A .and Fatoye, O (2019). Effect of Egusi melon (Colosynthis citrulus L.) varieties on weed suppression. In: Adesina, J. M., Iwala, O. S., Kekere, O. and Ajayi, A. J. Ajayi E. O. and Idowu-Agida O.O. (Eds.). Horticultural Production for Sustainable Economic Growth and Development. Book of Proceedings of the 37th Annual Conference of Horticultural Society of Nigeria, Faculty of Agricultural Technology, Rufus Giwa Polytechnic, Owo, Ondo State Nigeria. 18th – 22nd November, 2019. Pp. 407-409
  5. Ajayi, E. O., Tairu, F. M. and Akinleye, O. C (2018). Growth and Yield of three Varieties of Tomato as Influenced by Staking and Spacing. Proceedings of the 36th Annual Conference of Horticultural Society of Nigeria (Hortson), held at Faculty of Agriculture Shabu-Lafia Campus, Nasarawa State University, Keffi, Nasarawa State, Nigeria between 18th and 22nd November, 2018. Pp 120 – 126.  ISSN 978-978-54729-6-7
  6. Okonji C. J., Ajayi E, O., Adewale B, D., Adara, T, M., Oladigbolu, A.A and Oyerinde J. B (2018). Nutritional Efficacy of two Plant Extracts as Foliar Application on the Yield and Yield Components of Okra (Abelmoschus esculentus (l.) Moench), in Sub-humid Region of Nigeria. Proceedings of the 36th Annual Conference of Horticultural Society of Nigeria (Hortson), held at Faculty of Agriculture Shabu-Lafia Campus, Nasarawa State University, Keffi, Nasarawa State, Nigeria between 18th and 22nd November, 2018. Pp 154 – 162.  ISSN 978-978-54729-6-7
  7. Adebiyi, E.O; Ajayi, E.O; Oladosu, B.O and Folarin, E.A (2017). Effect of different organic manure source on growth and yield of cucumber (Cucumis sativus L) in forest agro-ecological zone of Nigeria. Proceedings of the 35th Annual conference of Horticultural Society of Nigeria (HORTSON), held at Kabba College of Agriculture, Kabba, Kogi State between 29th October and 3rd November, 2017. Pp 39-45.
  8. Adeoye, P.O; Ajayi, E.O and Oladosu, B.O (2017). Grafting success of five cultivars of mango on Ogbomoso rootstock in forest agro-ecological zone of Nigeria. Proceedings of the 35th Annual conference of Horticultural Society of Nigeria (HORTSON), held at Kabba College of Agriculture, Kabba, Kogi State between 29th October and 3rd November, 2017. Pp 72-75.
  9. Ajayi, E.O; Akinfasoye, J.A; Olofintoye, T.J and Olasanmi, O.F (2017). Response of open pollinated and hybrid sweet corn varieties (Zea mays L.) to organic fertilizer rates in forest agro-ecological zone of Nigeria. Proceedings of the 35th Annual conference of Horticultural Society of Nigeria (HORTSON), held at Kabba College of Agriculture, Kabba, Kogi State between 29th October and 3rd November, 2017. Pp 147-153.
  10. Ajayi, E.O; Askira, M.A; Akinfasoye, J.A; and Ojelabi, I.A (2017). Effect of mulching on sweet corn grown in inland valley of Ibadan, humid forest zone of Nigeria. Proceedings of the 35th Annual conference of Horticultural Society of Nigeria (HORTSON), held at Kabba College of Agriculture, Kabba, Kogi State between 29th October and 3rd November, 2017. Pp 154-157.
  11. Ikoro, J.I; Okafor, B.N; Ajayi, E.O; Oyewole, B.O; Igbegwu, F.C and Oso, O.O (2017). Citrus seedlings performance in a citrus-legume intercrop. Proceedings of the 35th Annual conference of Horticultural Society of Nigeria (HORTSON), held at Kabba College of Agriculture, Kabba, Kogi State between 29th October and 3rd November, 2017. Pp 486-489.
  12. Oke, O.A; Akinsola, O.A; Kolawole, R.O; Olajide-Taiwo, L.O; Oladigbolu, A.A and Ajayi, E.O (2017). Adoption of intergrated pest management (IPM) to contain the infestation of Tuta absoluta in Nigeria. Proceedings of the 35th Annual conference of Horticultural Society of Nigeria (HORTSON), held at Kabba College of Agriculture, Kabba, Kogi State between 29th October and 3rd November, 2017. Pp 690-694.
  13. Oladosu, B.O; Ajayi, E.O; Adebiyi, E.O; Oladigbolu, A.A and Hammed, J.O (2017). Effect of spacing and organic manure on growth and leaf yield of celosia (Celosia argentea). Proceedings of the 35th Annual conference of Horticultural Society of Nigeria (HORTSON), held at Kabba College of Agriculture, Kabba, Kogi State between 29th October and 3rd November, 2017. Pp 727-731.
  14. Olofintoye, T.A.J; Aboyeji, C.M; Ajayi, E.O; Oladigbolu, A.A; Olaleye, O; Olugbemi, O and Abdul-Rafiu, A.M (2017). Morphology and grain yield responses of grain amaranth (Amaranthus cruentus L) to plant population and soil amendments in the southern guinea of Nigeria. Proceedings of the 35th Annual conference of Horticultural Society of Nigeria (HORTSON), held at Kabba College of Agriculture, Kabba, Kogi State between 29th October and 3rd November, 2017. Pp 759-768.
  15. Olofintoye, T.A.J; Aboyeji, C.M; Ajayi, E.O; Oladigbolu, A.A; Olaleye, O; Olugbemi, O and Abdul-Rafiu, A.M (2017). Response of Sesanum radiatum Schum. Vegetable and seed yield to phosphorus fertilizer under basal application of nitrogen fertilizer. Proceedings of the 35th Annual conference of Horticultural Society of Nigeria (HORTSON), held at Kabba College of Agriculture, Kabba, Kogi State between 29th October and 3rd November, 2017. Pp 769-775.
  16. Ajayi, E.O; Akinfasoye, J.A; Ogunleti, D.O; and Monkio, T.N. (2016). Growth and yield of two varieties of jute plant (Corchorus olitorus L.) under different rates of organic fertilizer. Proceedings of the 34th Annual conference of HORTSON, held at Federal University, Gashua, Yobe State between 23rd and 26th of October, 2016. Pp 81-85.
  17. Ajayi, E.O; Makinde, A.A; Okeleye, K.A; and Sakariyawo, S.O. (2016). Response of grain amaranth accessions to micrometeorological indices under optimal and sub-optimal moisture condition. Proceedings of the 34th Annual conference of HORTSON, held at Federal University, Gashua, Yobe State between 23rd and 26th of October, 2016. Pp 149-158.
  18. Idowu-Agida, O.O; Olaniyi, J.O; Akinfasoye, J.A and Ajayi, E.O (2016). Influence of staking cucumber (Cucumis sativa L.) on yield components and fruit quality. Proceedings of the 34th Annual conference of HORTSON, held at Federal University, Gashua, Yobe State between 23rd and 26th of October, 2016. Pp 445-450.
  19. Akinpelu, O.A, Adetula, O.A, Aladele, S.A, Chikaleke, V.A, Orpkeh, U, Ajayi, E.O, Oke, A, Oke, K.E, Taiwo, S.O amd Okpara, S.C (2014). Correlation analysis of macro and micro nutrient concentrations in the leaf of 62 okra (Abelmoschus esculentus) accessions in South West Nigeria. Proceedings of the 32nd Annual Conference of HORTSON, held at Federal University of Agriculture, Abeokuta Ogun State between 19th and 23rd of October, 2014. Pp 153-156.
  20. Adetula, O.A; Aladele, S.A; Chikaleke, V.A; Orkpeh, U; Ajayi, E.O; Akinpelu, E.A; Oke, A; Oke, K.E; Taiwo, S.O and Okpara, S.C. (2011). Germplasm characterization and preliminary evaluation of 62 okra accessions in South West Nigeria. Proceedings of the 35th Annual Conference of Genetics Society of Nigeria. Held at Ahmadu Bello University, Zaria between 10th-14th October, 2011. pp 161-166
  21. Adetula, O.A; Orkpeh, U. and Ajayi, E.O. (2010). Morphological diversity and variability of vegetative characters of Corchorus olitorus. Proceedings of the 34th Annual conference of Genetic Society of Nigeria. Held at National Horticultural Research Institute, Ibadan between 19th and 24th September, 2010. pp 281-284.
  22. Ajayi, E.O; Akinfasoye, J.A; Taiwo, S.O; Akinpelu, E.A. and Okpara, S.C (2010). Effect of fertilizers types and plant population on growth and yield of pepper (Capsicum annum L.) Proceedings of the 28th Annual conference of HORTSON, held at Federal University of Technology, Minna between 7th and 11th of November, 2010. Pp 127-131.
  23. Akinfasoye, J.A; Ajayi E.O; Idowu-Agida, O.O and Ogunleti D.O (2010) Varietal evaluation of eggplant for growth, yield charactersand adaptability to derived guinea ecology. Proceedings of the 28th Annual conference of HORTSON, held at Federal University of Technology, Minna between 7th and 11th of November, 2010. Pp 132-135.
  24. Akinfasoye, J.A; Babalola, S.O; Oyebanji, O; Ogunleti, D.O and Ajayi, E.O (2009). Effect of hot water treatment on the postharvest storage of tomatoes (Lycopersicum esculentum) cv 1402. Proceedings of the 27th Annual conference of HORTSON, Kano Pp 115-118.