Open Journal of Agricultural Research <p><strong><em>Open Journal of Agricultural Research</em></strong> is an international journal dedicated to the advancements in agriculture throughout the world. The goal of this journal is to provide a platform for scientists, students, academics and engineers all over the world to promote, share, and discuss various new issues and developments in different areas of agricultural sciences.</p> en-US (Robert Williams) (Robert Williams) Tue, 21 Feb 2023 07:25:31 +0000 OJS 60 Effects of Three Selected Pollinator-Friendly Practices on Garden Eggplants (Solanum aethiopicum) at Mankessim in the Central Region of Ghana <p>This experimental study was carried out to evaluate the effect of three selected pollinator-friendly practices on the African eggplant (<em>Solanum</em> <em>aethiopicum)</em> at Mankessim in the Central region of Ghana. The study focused on determining how the practices affect the production and yield of garden eggs. The three pollinator-friendly practices were the use of mulch, cassava hedgerow/marigold plants and controlled pesticide application in garden egg farms. Experimental-control group design was used. Mulching positively influenced the number of flowers, fruits and height of garden eggplants. Cassava hedgerow/marigold plants influenced the number of flowers, but had no significant effect on the number of fruits and plants’ height. There was no effect on the number of flowers, fruits, and height of garden eggplants when pesticide application was controlled or uncontrolled. No significant influence was observed in fruit weight in all treatment and control plots. The growth and yield trends observed in this research indicated that practicing the three pollinator-friendly practices may encourage flower visitors leading to effective pollination and increased yields. It is recommended that mulching be practised in garden egg farming to increase the growth and productivity of garden eggplants.</p> Millicent Gyesi, Emmanuel Sylvanus Aidoo, Justice Kobina Asmah Copyright (c) 2023 Open Journal of Agricultural Research Fri, 06 Oct 2023 00:00:00 +0000 Response of Three Cucumber Cultivars to the Application of Sulphate of Ammonia as top Dressing with Respect to Fruit Yield and Shelf Life <p>The experiment was conducted in the experimental field of the Horticulture Department, University for Development Studies (UDS), Nyankpala campus with the aim of determining the response of three cucumber cultivars (Marketer, Nandini, Pointset) to the application of sulphate of ammonia as top dressing with respect to fruit yield, and shelf life. It was a 3 x 3 x 2 factorial arranged in a randomized complete block design with three replications. Data was collected on total fruit yield, shelf life and percentage fruit decay in storage. Their effect on the varieties differed significantly to a varying degree. The factors, however, had no significant impact and caused no difference in the fruit yield and fruit weight. 15:15:15 NPK effect on the cucumbers caused a high decay incidence when applied alone or in combination with (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>. Therefore, the application rate may be revised or reduced to experiment if decay incidence would decline in storage. Further studies may extensively be carried out to note if varying the rate of NPK would impact positively on the shelf life of cucumber. (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> effect increased weight loss in cucumbers hence, better storage techniques should be considered by controlling high temperatures. Complete fertilizer; 15:15:15 NPK and (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> had a positive impact on protein and fibre. Hence, their application is recommended for increasing protein and fibre level in cucumbers.</p> Yakubu Jacob Fuseini, Alhassan Nurideen Copyright (c) 2023 Open Journal of Agricultural Research Mon, 20 Feb 2023 00:00:00 +0000 An Assessment of Insect Fauna on Staminate and Pistillate Flowers of Cocos nucifera: A Case of Asebu in the Central Region of Ghana <p>Quantitatively, this study aimed to determine the abundance and diversity of the insect fauna that visits the staminate and pistillate flowers of <em>Cocos nucifera.</em> The study was conducted at an experimental plantation belonging to the Coconut Research Programme (CRP) of the Oil Palm Research Institute (OPRI) of the Council for Scientific and Industrial Research (CSIR), to provide diagnostic support for the Cape St. Paul Wilt Disease (CSPWD) at Asebu in the Central Region of Ghana. The populations of coconut palms represented the dwarf type with few tall ecotypes. Five Insects were randomly chosen with newly opened inflorescences. Observations and collections of insect visitors to coconut flowers were made once a week on 30 newly opened inflorescences, five from each batch within the plantation. Specimens of the data were deposited in the official insect collection and processed at the laboratory of the Entomology Museum of the Department of Conservation Biology and Entomology, University of Cape Coast, Ghana. <strong> </strong>The study indicated that 9 different species of insects were identified to be the true fauna that visited the staminate and pistillate flowers of <em>C. nucifera Ethiosciapus sp., Sarcophaga sp., Scolia dubia, Lucilia sp., Ornidia sp., Apis melifera, Dactylurina standingeri,</em> Red Ant and Black Ant. These insects were observed in all the six batches considered and were available at all times of the day. Most of the insects were observed in the early morning from 6 am - 9 am followed by the evening 4 pm –7 pm. The abundance of insect visitors was low during the mid-day (11 a.m. to 3 p.m.) in all six batches during high temperatures. The results of this study revealed that there were abundances of <em>Ethioscipus sp. </em>was the least abundant in all the batches followed by <em>Scolia dubia </em>then <em>Sarcophaga sp.</em> Red Ants had the highest abundance in most of the Batches thus becoming the most abundant insect that forage the coconut inflorescence at the Asebu plantation. The bees, <em>Apis melifera </em>and<em> Dactylurina standingeri </em>were the most abundant species after the Red Ants. All these groups of insects were not considered in the study and it is recommended that further studies consider such visitors to observe which insects are doing what on the inflorescence. The range for the ‘time of day for’ of the study was mostly diurnal (morning 6 am-9 am, afternoon 11 am-2 pm and evening 4 pm7 pm). There was no observation made of the pollination system or activities of these insect visitors nocturnally. There may be high pollination activities of these insects during the late evenings. It is recommended that future work should incorporate the late evening period to observe an abundance of diurnal insect visitors of the coconut inflorescences.</p> Emmanuel Sylvanus Aidoo, Millicent Gyesi Copyright (c) 2023 Open Journal of Agricultural Research Fri, 27 Oct 2023 00:00:00 +0000 Health condition of palm trees of Mexico City, with an emphasis on “crowns” <p>The government of Mexico City carried out the introduction of palm trees in the 50s to increase the visual appearance of the main avenues. As a result of introduction of these exotic species, phytosanitary problems appeared. Currently there is scarce information on how to evaluate the health of these majestic monocots, in this sense, it is necessary to implement assessment scales to determine the health condition of the most frequently found species to advance on their care and management. The present study had the following objectives: 1) To determine the current state of health of palm trees by means of a scale of visual evaluation of the crown; 2) To know the diversity and structural characteristics of palm trees and 3) To determine the influence of composite variables on the ecosystem services such as the amount of shade provided. Health of palm trees were evaluated two times (dry and rainy seasons in 2022) on 35 transects of 200 m length. An imaginary circle divided into twelfths was overlapped on palm tree “crowns”, and through it, two absolute variables, Live Crown Ratio (LCR) and Crown Quality (CQ) were evaluated. Composite variables were also calculated. The 12/12 health scale adapted in the present study was useful. Four health categories were obtained for the Live crown ratio (LCR): 7.62% of the palm trees were in critical condition, 7.80% were in intermediate condition, 80.36% were in normal condition, and 4.20% were in excellent condition. Meanwhile, for crown quality (CQ), the percentages were 13.50%, 20.00%, 56.96% and 0.43%, respectively. The total height and “crown” diameter showed a positive correlation with the volume composite variables. The shadow area projected as an important ecosystem service increased as the health of the palm trees improved. This is the first study on palm trees health assessment in Mexico City.</p> Luz de Lourdes Saavedra Romero, Dionicio Alvarado-Rosales, Alejandra Almaraz-Sánchez, Andrés Quezada-Salinas, Silvia Edith García-Díaz, Sergio Aranda-Ocampo, Carlos Fredy Ortiz-García, Armando Equihua-Martínez, José Abel López-Buenfil Copyright (c) 2023 Open Journal of Agricultural Research Thu, 06 Jul 2023 00:00:00 +0000