Papers by johnson Ogunsua
In summer season, sunburn due to high temperature with strong light intensity is a main problem o... more In summer season, sunburn due to high temperature with strong light intensity is a main problem of Cavendish banana during fruit growth in Chiang Rai being a tropical area which affects its quality. The influence of three different material covers were investigated on Cavendish banana quality in field and sunburn protection in summer season. Three cover treatments include 1, commercial cover (CC) as control consist thin-nonwoven (0.05 mm), brown paper and perforated blue polyethylene (PE), 2, Developed nonwoven cover (DNW) consist thin-nonwoven, nonwoven (0.17 mm) and PE and 3, Aluminum foil cover (ALF) consist thin-nonwoven and aluminum foil (0.09 mm) with all cover treatments opened at the bottom. The covers were applied between May 14 and June 26, 2017. After six weeks of bunch cover, banana fruits were harvested and determined fruit quality on the first hands at two stages namely: mature green (light full three-quarters) and ripening. The results showed that both DNW and ALF treatments significantly reduced sunburn percentage than those bagged with CC (p≤0.05). DNW and ALF covers did not significantly affect the fruit qualities such as hand weight, total soluble solids (TSS), pulp per peel ratio and peel color (L* and H°), when compared with CC treatment (p>0.05). This study showed that both DNW and ALF materials possess potential properties as banana covers to reduce field loss from sunburn in summer season thereby improving the fruit visual quality.
This research work examined the use of calcium carbide as ripening agent for banana and plantain ... more This research work examined the use of calcium carbide as ripening agent for banana and plantain in major markets within Ilorin metropolis. Open ended/structured questionnaires were administered to banana/plantain handlers in six different markets, afterward samples of ripe banana and plantain were also collected from different points in each market at the same time for physicochemical and mineral analyses. Results showed that a total of 85 respondents returned their questionnaires from all the markets; of which majority were female (99 percent), 89 percent of them were married, only 35 percent had formal education, 94 percent of them do store their plantain/banana, 83 percent were aware of the use of calcium carbide in ripening of plantain/banana but only 1 percent admitted using it. Comparing with the control samples, the physicochemical and mineral analyses showed that there were reduced moisture and vitamin C contents with increased values of arsenic and phosphorus being recovered from banana and plantain samples. Many authors had associated induced ripening with the use of ripening agent such as calcium carbide with reduced moisture and vitamin C contents with elevated values of arsenic and phosphorus in ripe fruits which had many health risks. Samples of banana and plantain collected from Ilorin markets were probably forced ripen with artificial ripening agents. The needs for constant education of the public especially fruits handlers on the health implications of the use of calcium carbide as ripening agent cannot be overemphasized.
Introduction Drying of agricultural produce is a simple process through which agricultural produc... more Introduction Drying of agricultural produce is a simple process through which agricultural products can be preserved for future use by removing available moisture in the crops to avoid deterioration (Ohijeagbon et al., 2016). Among the common methods used in drying and preserving agricultural products are open air and uncontrolled sun drying (Toshniwal and Karale, 2013; Aderinlewo et al., 2013). Previous studies have reported that these methods could pose serious challenge on food quality with respect to product contamination due to dust, insect infestation and animal contact which invariably can lead to product degradation (Ratti and Mujumdar, 1997; Okoroigwe et al., 2013). This might compromise the food quality and causes reduction in the market value of such commodity (Toshniwal and Karale, 2013; Sadodin and Kashani, 2016).
Three different bunch covers were studied for reducing thrips damage on Cavendish bananas and mai... more Three different bunch covers were studied for reducing thrips damage on Cavendish bananas and maintaining fruit quality during the rainy season. Three different bunch cover materials were tested: 1) commercial cover (CC) of thin-nonwoven (0.05 mm), brown paper and perforated blue polyethylene (PE) as the control; 2) waterproof nonwoven cover (WPNW) of thin-nonwoven and waterproof -nonwoven (0.17 mm) paper; and 3) aluminum foil cover (ALF) of thin-nonwoven paper and aluminum foil (0.09 mm). The covers were installed around 20 d after inflorescent emergence (AIE) and applied for 11 wk AIE until harvesting at the mature stage. The results showed that thrips damage was significantly (p ≤ 0.05) reduced in WPNW (1.2) and ALF (1) compared to CC (2). The CC treatment provided the lowest total soluble solids content (17.7ºBrix). However, fruit quality parameters such as hand and finger weight were not significantly different among the treatments compared with the CC treatment. The results suggested that WPNW and ALF materials have potential for using as bunch covers which could reduce thrips damage and increase the quality of exported banana fruit during the rainy season.
Three different bunch covers were studied for reducing thrips damage on Cavendish bananas and mai... more Three different bunch covers were studied for reducing thrips damage on Cavendish bananas and maintaining fruit quality during the rainy season. Three different bunch cover materials were tested: 1) commercial cover (CC) of thin-nonwoven (0.05 mm), brown paper and perforated blue polyethylene (PE) as the control; 2) waterproof nonwoven cover (WPNW) of thin-nonwoven and waterproof -nonwoven (0.17 mm) paper; and 3) aluminum foil cover (ALF) of thin-nonwoven paper and aluminum foil (0.09 mm). The covers were installed around 20 d after inflorescent emergence (AIE) and applied for 11 wk AIE until harvesting at the mature stage. The results showed that thrips damage was significantly (p ≤ 0.05) reduced in WPNW (1.2) and ALF (1) compared to CC (2). The CC treatment provided the lowest total soluble solids content (17.7ºBrix). However, fruit quality parameters such as hand and finger weight were not significantly different among the treatments compared with the CC treatment. The results suggested that WPNW and ALF materials have potential for using as bunch covers which could reduce thrips damage and increase the quality of exported banana fruit during the rainy season.
The research study estimated the impact of season, maturity and temperature inside different mate... more The research study estimated the impact of season, maturity and temperature inside different material covers in predicting defect on banana peel from hand weight (HW), pulp per peel ratio (PPR), sunburn (SB) as well as thrips damages (TD) score of Cavendish banana in Chiang Rai. The banana bunch covers were conducted in summer (May to June 2017) and in rainy (August to October 2017). A one hidden layer feed forward backpropagation artificial neural network (ANN) was developed by varying the hidden node in a hidden layer for 2-20 nodes. Four separately ANN models were performed for Cavendish banana to predict qualities by using R and RStudio programs. Data input variables were rate of heat energy transmitted (Qx), hand location, and temperature profiles. The results showed that the 4-18-1, 6-16-1, 5-8-1, and 5-12-1 architectures were the most suitable model for HW, PPR, SB and TD score, respectively. The model performance presented the relatively high R 2 of 0.76, 0.96, 0.86, and 0.8...
Agronomy, 2021
Performance of different cover materials on improving Cavendish banana quality was examined durin... more Performance of different cover materials on improving Cavendish banana quality was examined during winter and summer. The banana bunch was covered with a thin nonwoven innermost layer, followed by cover materials arranged from inner to outer as follows. (1) Control (commercial cover), paper/polystyrene sheet (PS)/non-perforated blue polyethylene (NPPE), (2) nonwoven (NW)/NPPE, (3) waterproof nonwoven (WPNW), (4) aluminum foil (ALF), and (5) WPNW + ALF. For the summer trial, control without PS layer was applied. Material properties including thickness, light transmissivity and heat energy (Qx) were evaluated. Results showed that Qx values transferred through PS sheet, NW, WPNW and ALF were not significantly different. ALF exhibited the lowest light transmissivity, associated with the highest fruit lightness (L*) and lowest fruit weight. For the winter trial, all cover materials exhibited chilling injury on fruit caused by temperatures below 10 °C. For the summer trial, five treatment...
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Papers by johnson Ogunsua