Browsing by Author "Emmanuel Oyamedan Imoloame"
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- ItemAgronomic and economic performance of maize (Zea mays L.) as influenced by seed bed configuration and weed control treatments(Degruyter, 2021-05) Emmanuel Oyamedan ImoloamePoor method of weed control and indiscriminate use of herbicides led to low yields, economic returns, and increasing environmental pollution in the southern Guinea savanna of Nigeria. These prompted the conduct of field trials in the 2018 and 2019 cropping seasons to determine the effects of seed bed configuration and weed control treatments on the agronomic and economic performance of maize. The treatments consisted of flat and ridge seed beds and six weed control treatments. The experimental design was a randomized complete block with split plot arrangement and replicated thrice. Results showed that seed bed configuration had significant (p ≤ 0.05) effect on weed density, but not on maize grain yield. All the weed control treatments significantly (p ≤ 0.05) reduced weed infestation and increased maize grain yields compared to the weedy check. Furthermore, Primextra at 1.5 kg active ingredient per hectare (kg a.i. ha−1) + One supplementary hoe weeding (SHW) at 6 weeks after sowing (WAS), Primextra + Paraforce at 1.5 + 0.7 kg a.i. ha−1, and Primextra + Guard force at 1.5 + 0.03 kg a.i. ha−1 applied on flat seed beds and two hoe weeding at 3 and 6 WAS + ridge produced higher yields, profit, and economic returns. Therefore, the above reduced herbicide rates applied on flat seed beds are recommended to farmers as alternatives to two hoe weeding at 3 and 6 WAS for profitable production of maize.
- ItemEffect of method of weed control and insecticide (Lambda cyhalothrin) rates on the productivity of cowpea (Vigna unguiculata (L.) walp) in a southern Guinea savanna of Nigeria(Weed Science Society of Brazil, 2017-10-09) Emmanuel Oyamedan Imoloame; Oluremi Solomon Osunlola- Field trials were conducted in two locations, at the Teaching and Research (T&R) Farm of the College of Agriculture, Kwara State University and Ga-Alanu Village, Malete, in the 2015 cropping season. The objective this work was to evaluate the effect of herbicide application associated to the insecticide Lambda cyhalothrin on weed control, and yield of cowpea. The experiment consisted of 18 treatments arranged in a factorial scheme. The first factor was three insecticide rates (0 ml ha-1, 8.75ga.i.ha-1 and 17.5ga.i. ha-1). The second factor was the six methods of weed control (pendimethalin at 1.5kg a.i ha-1, pendimethalin at 2.0kg a.i ha-1, pendimethalin at 1.5 kg a.i. ha-1 plus one supplementary hoe weeding (SHW), metholachlor + diuron at 1.5 + 0.6 kg a.i ha-1, hoe weeding at 3 and 6 weeks after sowing (WAS) and a weedy check). The treatments were laid out in randomized complete block design arranged factorially with 3 repetitions . Variables measured were weed density, weed dry matter, relative importance value of weed species, plant height, crop vigour, number of pods/plot and grain yield. Data collected was subjected to analysis of variance and means were separated using Least Significant Difference (LSD) at 5% level of probability. Results showed that insecticide rates at 8.75ga.i.ha-1 and 17.5ga.i.ha-1, and pendimethalin at 2.0kg a.i.ha-1 or pendimethialin at 1.5kg a.iha-1 plus one SHW promoted good growth and higher yield of cowpea. Keywords: pendimethalin, agrochemicals, metholachlor + diuron, hoeing, yield Experimentos de campo foram realizados em dois locais, na Fazenda de Ensino e Pesquisa (E & P) da Faculdade de Agricultura, Universidade Estadual de Kwara, e na vila de Ga-Alanu, Malete, na temporada de cultivo de 2015. O objetivo deste trabalho foi avaliar o efeito da aplicação de herbicidas associada ao inseticida Lambda cyhalothrin no controle de ervas daninhas e na produção de feijão-caupi. O experimento consistiu em 18 tratamentos dispostos em um esquema fatorial. O primeiro fator foi a taxa de inseticida, em três níveis (0 ml ha-1, 8,75 ga.i.ha-1 and 17,5 ga.i. ha-1). O segundo fator foi o método de controle de ervas daninhas, em seis categorias (1,5 kg a.i. ha-1 de pendimetalina, 2,0 kg a.i. ha-1 de pendimetalina, 1,5 kg a.i. ha-1 de pendimetalina associado a uma monda suplementar (MS) para eliminar as ervas daninhas, 1,5 + 0,6 kg a.i. ha-1 de metolacloro + diurão, monda suplementar para eliminar as ervas daninhas na 3ª e 6ª semanas após a semeadura (SAS) e uma checagem de ervas daninhas). Os tratamentos foram distribuídos em delineamento de blocos completos aleatorizados fatorialmente organizados com 3 repetições. As variáveis medidas foram a densidade da erva daninhas, a matéria seca das ervas daninhas, o valor de importância das espécies de ervas daninhas, a altura da plantas, o vigor da cultura, o número de vagens/parcela e o rendimento de grãos. Os dados coletados foram submetidos à análise de variância e as médias foram separadas com base na menor diferença significativa (MDS) ao nível de probabilidade de 5%. Os resultados mostraram que as taxas de 8,75 ga.i.ha-1 e 17.5 ga.i.ha-1 de inseticidas, e 2,0 kg a.i. ha-1 de pendimetalina, ou 1,5 kg a.i. ha-1 de pendimetalina associado a uma MS, promoveram um bom crescimento e maior rendimento de feijão-caupi.
- ItemEvaluation of Sowing Methods and Herbicide Mixtures for Weed Management and Productivity in Sesame (Sesamum indicum L.)(University of Putra, Malaysia, 2023-11-07) Emmanuel Oyamedan Imoloame; Lukman Funsho AbubakarSesame is an oil seed crop with great economic value. However, the production of this crop has been limited by weed competition, which prompted a field experiment during the 2021 cropping season in two locations: Teaching and Research Farm, Kwara State University, Malete, and National Centre for Agricultural Mechanization (NCAM), Idofian, Ilorin, Kwara, Nigeria. The aim was to determine the treatment combinations of sowing methods and herbicide mixtures for the effective management of weeds and for increasing sesame productivity in the southern Guinea savanna of Nigeria. The experiment consisted of twenty treatments comprising two sowing methods (dibbling and drilling) and ten weed control methods. Results showed that all the weed control methods reduced weed dry matter (67.15–186.20 and 42.00–92.45 g/m2) than the weedy check (291.55 and 155.55 g/ m2) at Malete and NCAM, respectively. They also reduced the weed density (48.40–68.45 and 34.00–50.00/m2) compared to the weedy check (103.60 and 73.15 g/m2) at Malete and NCAM, respectively, from 6 to 12 weeks after planting (WAP). Dibbling (85.15 and 48.81 m2) proved superior to the drilling method (172.42 and 51.58/m2) for the management of weeds from 6–12 WAP and for promoting higher crop yield (dibbling: 78.90 and 422.70 kg/ha; drilling: 37.50 and 326.80 kg/ha) in Malete and NCAM, respectively. The treatment combinations with the highest gross margin were hoeing twice at 3 and 6 WAP × dibbling ($ -191.15 and $ 318.57), pendimethalin (P) + diuron (D) at 0.5 + 0.5 kg a.i./ha ($ -199.88 and $ 182.43), 2.0 + 1.5 × dibbling ($ -273.59 and $ 156.65) and butachlor (B) + diuron (D) at 1.5 + 1.0 kg a.i./ha × drilling ($ -269.59 and $ 177.38) at Malete and NCAM, respectively. Therefore, it is recommended that the dibbling sowing method at a spacing of 30 cm × 30 cm and thinned to 3 plants/stand integrated 1152 Pertanika J. Trop. Agric. Sci. 46 (4): 1151 - 1172 (2023) Emmanuel Oyamedan Imoloame and Lukman Funsho Abubakar with herbicide mixtures of pendimethalin at 0.5 + 0.5 kg a.i./ha is recommended as an alternative to hoe weeding for effective weed control, higher yield of sesame, and economic returns.
- ItemInfluence of fertilizer application timing and reduced herbicide dosage on weed infestation and maize grain yield(Weed Science Society of Indian, 2021-10-25) Emmanuel Oyamedan Imoloame; Elizabeth Alagbe; Oluwafemi Oluwatosin LawalA field trial was conducted in the southern Guinea savanna of Nigeria during 2018 and 2019 to determine the better time of fertilizer application and identify effective weed management options to manage weed infestation and increase maize grain yield. The treatments consisted of two fertilizer application timings and six weed control treatments. The experiment was a 2 x 6 factorial in a randomized complete block design and replicated three times. The fertilizer application at 0 and 6 weeks after seeding (WAS) was found better than application at 2 and 6 WAS in minimising weeds, however both the application timings had no significant influence on maize grain yield. The formulated readymixtures (RM) of metolachlor (373 g) + atrazine (375 g) at 1.5 kg/ha followed by (fb) one hoeing at 6 WAS, metolachlor (375 g) + atrazine (373 g) at 1.5 kg/ha fb nicosulfuron 0.03 kg/ha at 6 WAS, metolachlor + atrazine (RM) 1.5 kg/ha fb paraquat 0.7 kg/ha at 6 WAS and metolachlor + atrazine (RM) at 1.5 kg/ha fb 2,4- D (900 g) at 1.5 kg/ha significantly (p=0.05) reduced weed infestation by 89.3, 63.8, 48.2 and 39.8%, respectively. The use of metolachlor + atrazine (RM) 1.5 kg/ ha fb one hoeing at 6 WAS, metolachlor + atrazine (RM) 1.5 kg fb nicosulfuron 0.03 kg/ha increased maize grain yield by 82.5 and 69.7%, respectively. These treatment combinations integrated with fertilizer timing application at 0 and 6 WAS may be used for efficient, economical and more eco-friendly management of weeds for increasing maize grain yield.
- ItemIntegrated weed management practices and sustainable food production among farmers in Kwara State, Nigeria(De Gruyter, 2021-03-01) Emmanuel Oyamedan Imoloame; Ibrahim Folorunsho Ayanda; Olayinka Jelili YusufA survey was conducted in the Kwara State of Nigeria to study the integrated weed management (IWM) practices by farmers. This was in view of the poor weed management practices adopted by farmers, which is a major factor responsible for low yields of many arable crops in Kwara State. A multi-stage sampling technique was used to select a sample size of 480 respondents, and a structured interview schedule was used to elicit information from them. Data obtained were analyzed using descriptive statistics. Factor analysis was also carried out to examine the perception of farmers’ benefits of IWM. Results showed that the majority of farmers (29.4%) were youths, married (89.1%), and involved in medium-scale farming (47.2%). Furthermore, 50.8% of the farmers had primary or secondary education. Although farmers use different weed control methods, more than half of them (54.7%) use herbicides. Most farmers (92.6%) are engaged in the use of IWM, However, 73.5% of them use a combination of herbicides and hoe weeding. Although not properly practiced, farmers perceived IWM as having socio-environmental (29.229%) and techno-efficacious (23.495%) benefits over either hoe weeding or herbicides used alone. The findings suggest a need to train farmers on all aspects of IWM to achieve self-sufficiency in food production in Kwara State.
- ItemIntegrating Insecticide Spray Time and Weeding Regime to Manage Insect Pests and Yield of Cowpea in the Southern Guinea Savanna of Nigeria(Entomological Society of Nigeria, 2023-10-27) James Adebayo Ojo; Florence Bukky Aina; Emmanuel Oyamedan Imoloame; Abdulwasiu Ibrahim2Insecticide treatments are recommended for the control of insect pests in cowpea (Vigna unguiculata (L) Walp) in Sub-Saharan Africa. Nonetheless, these have unfavorable effects on man and the environment, in addition to being costly for smallholder farmers. The goal of this study was to find theoptimum insecticide spray time and weeding to manage insect pests and increase yield of cowpea. The experiment was designed as a randomized complete block in a split-plot arrangement with threereplications. The main plots consisting of spray time of insecticide application while the sub-plots consisting of weeding regimes. Data collected includes insect pest’s abundance, damage assessment and yield. The major insect pests observed were the cowpea aphids, thrips, maruca and pod suckingbugs. Insecticide sprays applied twice at 50 percent flowering and 50 percent podding, as well as a weeding regime applied either thrice or twice – at 3, 6, and 9 or at 3 and 6 weeks after sowing –effectively reduced insect population and damage, and increased yield of cowpea This recommendation can be incorporated into cowpea integrated pest management strategies among farmers in the study location.
- ItemWeed control and productivity of maize (Zea mays L.) in Malete, Kwara State of Nigeria(Mendel University, 2020-07-10) Emmanuel Oyamedan ImoloameThe need to determine the minimum application rates of commonly used herbicides in Malete and the Guineasavanna of Nigeria for effective weed control and higher grain yield of maize, triggered this study. Therefore, field trials were conducted at the Teaching and Research Farm of Kwara State University, Malete, to determine the weed control method that will be more effective in controlling weeds and give higher grain yield and cash returns in the production of maize. The experiment consisted of 9 treatments viz: primextra (metolachlor plus atrazine) + 2,4-D at 1.5 + 1.5 kg active ingredient (a.i.).ha-1, primextra + 2,4-D at 2.0 + 2.0 kg a.i. ha−1, primextra + 2,4-D at 2.5 + 2.5 kg ha-1, primextra + nicosulfuron at 1.5 + 0.03 kg a.i. ha−1, primextra + nicosulfuron at 2.0 + 0.05 kg a.i. ha−1, primextra + niconsulfuron at 2.5 + 0.07 kg a.i. ha−1, primextra at 1.5 kg a.i. ha−1 + one Supplementary Hoe Weeding (SHW) at 6 Weeks After Sowing (WAS), two hand weeding at 3 and 6 Weeks After Sowing (WAS) and a weedy check. These treatments were laid out in randomised complete block design (RCBD) with three replicates. Data collected were subjected to analysis of variance using Statistical Analysis Software (SAS) package, after which means were separated using Duncan’s Multiple Range Test (DMRT). Results showed that treatment combinations of primextra + one SHW at 6 WAS, two hoe weeding at 3 and 6 WAS, primextra + 2,4-D at 2.0 + 2.0 kg a.i. ha−1 and primextra + nicosulfuron at 2.0+0.05 kg a.i. ha−1 gave effective weed control, higher grain yield and cash returns. Therefore, primextra at 1.5 kg a.i. ha−1 + one SHW at 6 WAS, primextra +2,4-D at 2.0 + 2.0 kg a.i. ha−1 and primextra + nicosulfuron at2.0 + 0.05 kg a.i. ha−1 are recommended to farmers as alternative to two hoe weeding at 3 and 6 WAS.