Agricultural and Biological Sciences, Agronomy and Crop Science, Insect Science
11
Scopus Publications
81
Scholar Citations
4
Scholar h-index
1
Scholar i10-index
Scopus Publications
Phytochemical Profile and Insecticidal Potential of Leaf Essential Oil of Psidium guajava Growing in North Central Nigeria Lamidi Ajao Usman, Etimbuk Daniel Akpan, Olusegun Adebayo Ojumoola, Ridwan Olanrewaju Ismaeel, Aliu Bola Simbiat Journal of the Mexican Chemical Society, 2025 Loss of stored maize grains via infestation by Sitophylus zeamais contributes to food insecurity. This necessitates the use of synthetic chemicals by farmers to curtail the pest. Unfortunately, the pesticides are toxic to humans and unsafe for the environment. Interestingly, some plants possess phytochemicals that exhibit insecticidal activity without these drawbacks. This activity is linked to the type of phytochemicals, whose presence depends on environmental conditions that change with time of collection of plant samples. It is on this basis that we investigated how time of harvest affects the phytochemicals and insecticidal activity of P. guajava leaf essential oils. To accomplish these, pulverized leaves (500 g) from 7.00am and 1.00pm harvests were hydrodistilled individually for three hours using a Clevenger set up. GC–MS technique was used to characterize the oils while contact toxicity bioassay was used to assess the insecticidal activity of the oils. The yields of essential oils obtained from the leaves were 0.27±0.015 and 0.24±0.018 (w/w)%. β-Caryophyllene (14.7 and 18.2%), α-guaiene (13.7 and 10.6%), α-selinene (10.9 and 12.9%), globulol (9.5 and 8.1%), caryophyllene oxide (7.8 and 7.0 %) and eucalyptol (5.6 and 5.8 %) existed in higher quantities in the GC-MS results. Both oils were active against S. zeamais with LT50 of 59.23 and 121.09 hours and the highest activity was recorded for the oil of afternoon harvest. The oil from afternoon harvest can therefore serves as a cheaper and more innocuous substitute to synthetic insecticide for S. zeamais management in stored maize.
Identification of Drino quadrizonula Thomson and Chelonus sp. as Larval Parasitoids of Spodoptera frugiperda J. E. Smith in the Guinea Savanna Agroecological Zones of Nigeria Agriculturae Conspectus Scientificus, 2025
Seasonal difference in fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) abundance and plant injury on selected maize varieties in Ibadan, Southwest Nigeria Olusegun Adebayo Ojumoola, Adebayo Amos Omoloye, Vincent Chukwuemeka Umeh International Journal of Pest Management, 2024 The fall armyworm, Spodoptera frugiperda J.E Smith, is a highly destructive insect pest of maize that first invaded Africa in 2016 and has since posed additional constraints to maize production and food security in the region. This study thus investigated the seasonal difference in the abundance of S. frugiperda egg masses and larvae on 25 maize varieties during the early and late planting seasons of 2018 and 2019 in Ibadan, southwest Nigeria. The relationship between larva abundance and foliar damage was also investigated at three-, five- and seven weeks after planting (3WAP, 5WAP, and 7WAP). Results showed that abundance was higher in 2018, in the early season, and at 3WAP. Though foliar damage occurred weekly in both seasons, the relationship between foliar damage severity and larva abundance at 7WAP was consistently weak and insignificant. Also, in both seasons, most of the observed kernel damage was caused by stem borer and not fall armyworm larvae. To make timely fall armyworm management decisions, regular field scouting, especially within the first three weeks after planting, is recommended.
Agroecological zones influence maize infestation and damage severity by the fall armyworm (Spodoptera frugiperda [J. E. Smith, 1797]) in southwestern Nigeria Olusegun Adebayo OJUMOOLA, Adebayo Amos OMOLOYE Acta Agriculturae Slovenica, 2023 The fall armyworm (Spodoptera frugiperda) is an invasive and highly destructive insect pest that has caused extensive damage to maize in Africa since its first report on the continent in 2016. Information on fall armyworm infestation and damage within African agroecologies is essential for the development of appropriate pest management strategies, but these are scant in Nigeria. Consequently, in this study, fall armyworm infestation levels and severity of damage to maize in the three major maize-growing agro-ecological zones (humid forest, derived savanna, and southern guinea savanna) of southwestern Nigeria was investigated using standard field sampling protocols. Results showed that maize infestation and damage severity varied across agroecological zones, with the humid forest being the most impacted. Information provided will enhance decision-making for effective management of the fall armyworm in southwestern Nigeria.
Influence of Accession and Collection Method on the Diversity and Abundance of Insect Taxa on Muskmelon Agriculturae Conspectus Scientificus, 2023
Gas pressure cycling (GPC) and solvent-assisted gas pressure cycling (SA-GPC) enhanced oil recovery processes in a thin heavy oil reservoir Olusegun Ojumoola, Hongze Ma, Yongan Gu Energies, 2020 In this paper, gas pressure cycling (GPC) and solvent-assisted gas pressure cycling (SA-GPC) were developed as two new and effective enhanced oil recovery (EOR) processes. Eight coreflood tests were conducted by using a 2-D rectangular sandpacked physical model with a one or two-well configuration. More specifically, two cyclic solvent injection (CSI), three GPC, and three SA-GPC tests were conducted after the primary production, whose pressure was declined in steps from Pi = 3.0 MPa to Pf = 0.2 MPa. It was found that the CSI tests had poor performances because of the known CSI technical shortcomings and an additional technical issue of solvent trapping found in this study. Quick heavy oil viscosity regainment resulted in the solvent-trapping zone. In contrast, C3H8-GPC test at a pressure depletion step size of ∆PEOR = 0.5 MPa and C3H8-SA-CO2-GPC test at ∆PEOR = 1.0 MPa had the highest total heavy oil recovery factors (RFs) of 41.9% and 36.6% of the original oil-in-place (OOIP) among the two respective series of GPC and SA-GPC tests. The better performances of these two tests than C3H8- or CO2-CSI test were attributed to the effective displacement of the foamy oil toward the producer in the two-well configuration. Thus the back-and-forth movements of the foamy oil in CSI test in the one-well configuration were eliminated in these GPC and SA-GPC tests. Furthermore, C3H8-GPC test outperformed C3H8-SA-CO2-GPC test in terms of the heavy oil RF and cumulative gas-oil ratio (cGOR) because of the formation of stronger foamy-oil flow and the absence of CO2, which reduced the solubility of C3H8 in the heavy oil in the latter test. In summary, different solvent-based EOR processes were ranked based on the heavy oil RFs as follows: C3H8-GPC > C3H8-SA-CO2-GPC > CO2-GPC > C3H8-CSI > CO2-CSI.
Effect on germination and nutrient composition of storing cowpea [Vigna unguiculata (L.) Walp.] seeds in a hermetic atmosphere modified with essential oil vapour from leaves of sweet basil [Ocimum basilicum (L.)] Tropical Agriculture, 2018
Susceptibility of the life stages of Callosobruchus maculatus (Fabr.) in stored cowpea grains to fumigation with essential oil vapour of Ocimum basilicum L. Leaves Tropical Agriculture, 2016
RECENT SCHOLAR PUBLICATIONS
Oviposition site preferences of fall armyworm moth, Spodoptera frugiperda JE Smith (Lepidoptera: Noctuidae) on selected crops under a no-choice scenario O Ojumoola, O Durodola, M LAWAL, J Falola-Olasunkanmi Technoscience Journal for Community Development in Africa 4, 69-76 , 2025 2025
Assessing the impact of Sternochetus mangiferae (Coleoptera: Curculionidae) infestation on morphometrics and nutritional composition of mango V Odeje, O Ojumoola, A Omoloye Technoscience Journal for Community Development in Africa 4, 41-48 , 2025 2025
Identification of Drino quadrizonula Thomson and Chelonus sp. as Larval Parasitoids of Spodoptera frugiperda JE Smith in the Guinea Savanna Agroecological Zones of Nigeria OA Ojumoola, AA Usman, JA Falola-Olasunkanmi, MT Lawal Agriculturae Conspectus Scientificus 90 (3), 233-241 , 2025 2025
Influence of Black Soldier Fly Frass Fertilizer on Growth and Southern Blight Disease Development in Okra (Abelmoschus Esculentus (L.) Moench). A Oladimeji, OA OJUMOOLA, AA Lateef, EB ADEYEMI, AJ ABDULLAH Jordan Journal of Agricultural Sciences 21 (3) , 2025 2025 Citations: 1
Unlocking the potentials of the discarded: suitability of common food and fruit wastes in Ilorin metropolis for rearing black soldier fly, Hermetia illucens L. larvae OA Ojumoola, K Haddi, IO Sanusi, OM Salaudeen, RS Onabanjo, ... International Journal of Tropical Insect Science 45 (2), 901-911 , 2025 2025 Citations: 1
Phytochemical profile and insecticidal potential of leaf essential oil of Psidium guajava growing in north central Nigeria LA Usman, ED Akpan, OA Ojumoola, RO Ismaeel, AB Simbiat Journal of the Mexican Chemical Society, 480-488 , 2025 2025 Citations: 3
أثير سماد فضلات ذبابة الجندي الأسود على نمو وتطور مرض اللفحة الجنوبية في البامية (ABELMOSCHUS ESCULENTUS (L.) Moench) A Oladimeji, OA OJUMOOLA, AA Lateef, EB ADEYEMI, AJ ABDULLAH 2025
Natural weapons unleashed: Harnessing Hyptis suaveolens, charcoal dust, and wood ash extracts for controlling insect pests of Maize (Zea mays) SY Yusuf, AK Musa, HS Baba, FO Alao, OA Olaniran, AO Ojumoola, ... 2024
Influence of food quantity, larval density and size of rearing container on intra-instar cannibalism in fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera … OA Ojumoola, AA Omoloye International Journal of Tropical Insect Science 44 (1), 363-368 , 2024 2024 Citations: 4
CHEMICAL VARIABILITY AND FUMIGANT TOXICITY OF ESSENTIAL OILS FROM PEELS OF CITRUS RETICULATA L. NATIVE TO NIGERIA RO ISMAEEL, AL USMAN, OA OJUMOOLA NIGERIAN JOURNAL OF PURE AND APPLIED SCIENCES Учредители: Nigerian Journal … , 2024 2024
Influence of Accession and Collection Method on the Diversity and Abundance of Insect Taxa on Muskmelon OA Ojumoola, AO Adekoya, M Adebayo Agriculturae Conspectus Scientificus 88 (2), 141-149 , 2023 2023
Agroecological zones influence maize infestation and damage severity by the fall armyworm (Spodoptera frugiperda [JE Smith, 1797]) in southwestern Nigeria OA Ojumoola, AA Omoloye Acta Agriculturae Slovenica 119 (1), 1-9 , 2023 2023 Citations: 4
Use of Apis mellifera Honey to Predict Heavy Metal Loads in African Fruit Crops? – A Proof of Concept S Mustapha, AK Musa, OA Ojumoola, EA Orijemie Bee World 100 (1), 31-36 , 2023 2023
Vpliv agroekoloških območij na okužbo in velikost poškodb koruze zaradi ameriške koruzne sovke (Spodoptera frugiperda [JE Smith, 1797]) v jugozadni Nigeriji OA OJUMOOLA, AA OMOLOYE 2023
Maize farmers’ knowledge and management of fall armyworm (Spodoptera frupigerda) in southwest Nigeria O Ojumoola, A Omoloye, K Thomas Journal of Agricultural extension 26 (4) , 2022 2022 Citations: 6
Biology and morphometrics of the fall armyworm, Spodoptera frugiperda JE Smith (Lepidoptera: Noctuidae) in Ibadan, southwest Nigeria OA Ojumoola, AA Omoloye FUDMA Journal of Agriculture and Agricultural Technology 8 (1), 351-363 , 2022 2022 Citations: 3
On-Farm Assessment of Spodoptera frugiperda (Lepidoptera: Noctuidae) Infestation and Damage to Early-Whorl and Late-Whorl Maize in a Southern Guinea Savanna Agro-Ecology OA Ojumoola, VE Odeje, DC Folorunsho, FE Adebayo Applied Tropical Agriculture , 2022 2022 Citations: 1
Survival and morphometrics of the black soldier fly, Hermetia illucens (Diptera: Stratiomyidae) reared on common market food wastes in Nigeria OA Ojumoola, AS Owa, RA Adeagbo Malaysian Journal of Sustainable Agriculture (MJSA) 6 (2), 117-123 , 2022 2022 Citations: 3
Seasonal difference in fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) abundance and plant injury on selected maize varieties in Ibadan, Southwest Nigeria O Ojumoola, A Omoloye, V Umeh International Journal of Pest Management, 1 - 11 , 2022 2022 Citations: 17
Bioecology of the Fall Armyworm, Spodoptera frugiperda JE Smith on Maize, Zea mays L. in the South-West, Nigeria OA OJUMOOLA 2021 Citations: 1
MOST CITED SCHOLAR PUBLICATIONS
Seasonal difference in fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) abundance and plant injury on selected maize varieties in Ibadan, Southwest Nigeria O Ojumoola, A Omoloye, V Umeh International Journal of Pest Management, 1 - 11 , 2022 2022 Citations: 17
Effect of Drying on Yield, Chemical Composition and Insecticidal Activity of Leaf Essential Oils of Sweet Orange (Citrus sinensis) L Usman, O Watti, R Ismaeel, A Ojumoola Journal of the Turkish Chemical Society Section A: Chemistry 3 (1), 1-18 , 2016 2016 Citations: 9
Effects of five improved cowpea seed genotypes on oviposition and progeny development of Callosobruchus maculatus (F.)(Coleoptera: Chrysomelidae) AO Ojumoola, AA Adesiyun FUTA Journal of Research in Sciences 1, 84-90 , 2014 2014 Citations: 8
Maize farmers’ knowledge and management of fall armyworm (Spodoptera frupigerda) in southwest Nigeria O Ojumoola, A Omoloye, K Thomas Journal of Agricultural extension 26 (4) , 2022 2022 Citations: 6
Influence of food quantity, larval density and size of rearing container on intra-instar cannibalism in fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera … OA Ojumoola, AA Omoloye International Journal of Tropical Insect Science 44 (1), 363-368 , 2024 2024 Citations: 4
Agroecological zones influence maize infestation and damage severity by the fall armyworm (Spodoptera frugiperda [JE Smith, 1797]) in southwestern Nigeria OA Ojumoola, AA Omoloye Acta Agriculturae Slovenica 119 (1), 1-9 , 2023 2023 Citations: 4
Diversity and abundance of diurnal insects associated with dry season Amaranthus hybridus L. in the University of Ilorin, Nigeria AO Ojumoola, KM Raimi, AA Adesiyun Agro-Science 18 (2), 8-14 , 2019 2019 Citations: 4
Susceptibility of the life stages Callosobruchus maculates (Fabr.) in stored cowpea grains to fumigation with essential oil vapour of Ocimumbasilicum L. leaves OA Ojumoola, AA Adesiyun, LA Usman Trop. Agric 93 (3), 178-184 , 2016 2016 Citations: 4
Control of postharvest loss of tomato fruits caused by Fusarium verticilloides (Saccardo) Niremberg with aqueous leaf extracts of Azadirachta indica Juss and Vernonia … A Oladimeji, TH Aliyu, MD Orisasona, OA Ojumoola, RMO Kayode International Journal of Phytofuels and Allied Sciences, Ilorin 2 (1), 42-56 , 2013 2013 Citations: 4
Phytochemical profile and insecticidal potential of leaf essential oil of Psidium guajava growing in north central Nigeria LA Usman, ED Akpan, OA Ojumoola, RO Ismaeel, AB Simbiat Journal of the Mexican Chemical Society, 480-488 , 2025 2025 Citations: 3
Biology and morphometrics of the fall armyworm, Spodoptera frugiperda JE Smith (Lepidoptera: Noctuidae) in Ibadan, southwest Nigeria OA Ojumoola, AA Omoloye FUDMA Journal of Agriculture and Agricultural Technology 8 (1), 351-363 , 2022 2022 Citations: 3
Survival and morphometrics of the black soldier fly, Hermetia illucens (Diptera: Stratiomyidae) reared on common market food wastes in Nigeria OA Ojumoola, AS Owa, RA Adeagbo Malaysian Journal of Sustainable Agriculture (MJSA) 6 (2), 117-123 , 2022 2022 Citations: 3
Fumigant effect of sweet basil (Ocimum basilicum L) leaf essential oil on the longevity and fecundity of adult cowpea bruchid Callosobruchus maculatus (F) and on germination AO Ojumoola, AA Adesiyun, LA Usman Agrosearch 15 (2), 47-58 , 2015 2015 Citations: 2
Influence of Black Soldier Fly Frass Fertilizer on Growth and Southern Blight Disease Development in Okra (Abelmoschus Esculentus (L.) Moench). A Oladimeji, OA OJUMOOLA, AA Lateef, EB ADEYEMI, AJ ABDULLAH Jordan Journal of Agricultural Sciences 21 (3) , 2025 2025 Citations: 1
Unlocking the potentials of the discarded: suitability of common food and fruit wastes in Ilorin metropolis for rearing black soldier fly, Hermetia illucens L. larvae OA Ojumoola, K Haddi, IO Sanusi, OM Salaudeen, RS Onabanjo, ... International Journal of Tropical Insect Science 45 (2), 901-911 , 2025 2025 Citations: 1
On-Farm Assessment of Spodoptera frugiperda (Lepidoptera: Noctuidae) Infestation and Damage to Early-Whorl and Late-Whorl Maize in a Southern Guinea Savanna Agro-Ecology OA Ojumoola, VE Odeje, DC Folorunsho, FE Adebayo Applied Tropical Agriculture , 2022 2022 Citations: 1
Bioecology of the Fall Armyworm, Spodoptera frugiperda JE Smith on Maize, Zea mays L. in the South-West, Nigeria OA OJUMOOLA 2021 Citations: 1
Biodiversity and Conservation in Entomology in the 21st Century: An Overview NES Lale, AA Omoloye, U Zakka, OA Ojumoola Nigerian Journal of Entomology, 1-10 , 2020 2020 Citations: 1
Effect on germination and nutrient composition of storing cowpea [Vigna unguiculata (L.) Walp.] seeds in a hermetic atmosphere modified with essential oil vapour from leaves of … OA Ojumoola, AA Adesiyun, LA Usman Tropical Agriculture 95 (2) , 2018 2018 Citations: 1
Influence of selected legume seeds on emergence of Callosobruchus maculatus (F.) and its susceptability to Azadirachta indica (A. Juss) aqueous leaf extracts AO Ojumoola, DA Bamidele, RO Uddin II Agrosearch 18 (1), 77-89 , 2018 2018 Citations: 1
