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Ratnadass, A and P.S Marley, P S and Hamada, M A and Ajayi, O and Cisse, B and Assamoi, F and Atokple, I D K and Beyo, J and Cisse, O and Dakouo, D and Diakite, M and Dossou-Yovo, S and Le Diambo, B and Vopeyande, M.B and Sissoko, I and Tenkouanon, A (2003) Sorghum head-bugs and grain molds in West and Central Africa: I. Host plant resistance and bug–mold interactions on sorghum grains. Crop Protection, 22 (6). pp. 837-851. ISSN 0261-2194
Marley, P S and Ajayi, O (2002) Assessment of anthracnose resistance (Colletotrichum graminicola) in sorghum (Sorghum bicolor) germplasm under field conditions in Nigeria. Journal of Agricultural Science, 138 (2). pp. 201-208. ISSN 0021-8596
Tabo, R and Olabanji, O G and Ajayi, O and Flower, D J (2002) Effect Of Plant Population Density On The Growth And Yield Of Sorghum Varieties Grown On A Vertisol. African Crop Science Journal, 10 (1). pp. 31-38. ISSN 1021-9730
Ajayi, O and Sharma, H C and Tabo, R and Ratnadass, A and Doumbia, Y O (2001) Incidence and distribution of the sorghum head bug, Eurystylus oldi Poppius (Heteroptera: Miridae) and other panicle pests of sorghum in West and Central Africa. Insect Science and its Application, 21 (2). pp. 103-111. ISSN 0191-9040
Marley, P S and Thakur, R P and Ajayi, O (2001) Variation among foliar isolates of Colletotrichum sublineolum of sorghum in Nigeria. Field Crops Research, 69 (2). pp. 133-142. ISSN 0378-4290
Angarawai, I I and Dike, M C and Ajiboye, T O and Ajayi, O (2000) Dauro millet germplasm collection in Nigeria. International Sorghum and Millets Newsletter, 41. pp. 59-62. ISSN 1023-487X
Ajayi, O and Oboite, F A (1999) Importance of spittle bugs, Locris rubens (Erichson) and Poophilus costalis (Walker) on sorghum in West and Central Africa, with emphasis on Nigeria. Annals of Applied Biology, 136 (1). pp. 9-14. ISSN 1744-7348
Tabo, R and Ogungbile, A O and Gupta, S C and Ajayi, O (1999) Participatory Evaluation of Pearl Millet Cultivars in Northern Nigeria. International Sorghum and Millets Newsletter., 40. pp. 53-55.
Tabo, R and Ogungbile, A O and Gupta, S C and Ajayi, O (1999) Participatory Evaluation of Sorghum Cultivars in Northern Nigeria. International Sorghum and Millets Newsletter, 40. pp. 36-38.
Ajayi, O and Ajiboye, T O and Abubakar, B (1998) Yield loss caused by Coryna hermanniae Fabricius (Coleoptera: Meloidae) on pearl millet in Nigeria. International Sorghum and Millets Newsletter, 39. pp. 145-147.
Ajayi, O and Tabo, R and Ali, D (1996) Incidence of Stem Borers on Postrainy-season Transplanted Sorghum in Cameroon, Nigeria, and Chad in 1995/96. International Sorghum and Millets Newsletter, 37. pp. 58-59.
Olabanji, O G and Tabo, R and Flower, D J and Ajayi, O and Ushie, F and Kaigama, B K and Ikwelle, M C (1996) Survey of Masakwa Sorghum Growing Areas in Northeastern Nigeria. International Sorghum and Millets Newsletter, 37. pp. 61-63.
Ajayi, O and Ezueh, M I and Tabo, R and Asiegbu, J E and Singh, L (1995) Observations on Insect Damage to Pigeonpea in Nigeria. International Chickpea Newsletter, 2. pp. 76-78. ISSN 0257-2508
Tabo, R and Ezueh, M I and Ajayi, O and Asiegbu, J E and Singh, L (1995) Pigeonpea Production and Utilization in Nigeria. International Chickpea Newsletter, 2. pp. 47-49. ISSN 0257-2508
Pande, S and Harikrishnan, R and Alegbejo, M D and Mughogho, L K and Karunakar, R I and Ajayi, O (1993) Prevalence of sorghum diseases in Nigeria. International Journal of Pest Management, 39 (3). pp. 297-303. ISSN 0967-0874