Browsing by Author "Boateng, B. A."

Now showing 1 - 4 of 4

Effect of Nutritional Content of Processed Cassava Chips on Development of Prostephanus truncatus (Horn)
(World Journal of Agricultural Sciences 4(3): 404-408, 2008) Boateng, B. A.; Chijindu, E. N.
Samples of four differently processed cassava chips of two varieties were analysed for their chemical contents. Thereafter, they were infested with adults of Prostephanus truncatus at temperature of 25-34°C and relative humidity of 61-92% and studied for their susceptibility to pest in storage. The processed chips differed in their overall chemical contents and their responses to P. truncatus attack were significantly different (P<0.05). The beetles performance and overall development was high on fermented cassava chips which had highest pest population density (619.9±74.5) and suffered the greatest weight loss (71.7±8.8) than on parboiled chips with population density of (220.6± 48.6) and loss of (20.9±5.0). Correlation analysis between the biology of the pest and the chemical composition of the chips showed that association between the starch and population density of the pest was positive and significantly high (r = 0.71, P<0.05). Weight loss due to insect feeding also showed significant association with the starch content of the cassava chips (r = 0.82, P<0.05).
Effects of Maize Variety and Season on Population Dynamics Of The Larger Grain Borer, Prostephanus Truncatus (Horn) (Col.: Bostrichidae) and the Maize Weevil, Sitophilus Zeamais Mots.(Col.: Curculionidae) And Grain Losses In The Traditional ‘Ewe’ Storage Barn in Ghana
(University of Ghana, 1996-08) Boateng, B. A.; Ayertey, J. N.; Meikle, W. G.; University of Ghana, College of Basic and Applied Sciences, School of Agriculture, Department of Crop Science
The effects of three maize varieties and two storage seasons on the population dynamics of Prostephanus truncatus and Sitophilus zeamais were observed in the traditional4Ewe’ barn on the field. Two local varieties, Dzolokpuita and Abutia and an improved variety, Abeleehi, were stored with the husk on, during the long season, and Abutia only during the short season, of the 1994/1995 storage period. Destructive sampling techniques were applied to obtain data at monthly intervals for eight months. Maize variety showed significance (P<0.05) on P. truncatus density in the first four months of the long season but was barely so during the late storage phase. However, it did not influence the population dynamics of S. zeamais. Trend analysis showed significant increase in densities of P. truncatus over time especially during the late phase of the long season with a maximum densities of 131.1, 43.7, and 16.9 adults per kg. T grain for Abutia , Abeleehi and Dzolokpuita, respectively. S. zeamais however peaked at between 280 and 350 adults per kg grain on all varieties after only three months of storage, then stabilized at about 250 insects per kg. grain for the rest of the season. Maize variety also influenced weight loss with Dzolokpuita faring better. Good husk cover and relatively harder grains of Dzolokpuita may explain the lower P. truncatus density and weight loss recorded for this variety. Season did not to affect P. truncatus density but it influenced S. zeamais dynamics, and weight loss levels. The relative economic value loss also increased with time with value loss of 21.1%, 21.5%. and 19.4% for Abutia, Abeleehi and Dzolokpuita, respectively after eight months of storage
Postharvest Science and Technology
(Obeng-Ofori, D. and Cornelius, E. W. (eds.), The Stored Product Environment. - Accra, Ghana. -Smartline Publishers, pp. 47-66, 2008) Boateng, B. A.; Obeng-Ofori, D.
Postharvest Science and Technology
(Obeng-Ofori, D. and Cornelius, E.W.(eds) Population Growth, Global Food Problem, Crop Losses and Postharvest Technology. — Accra, Ghana :Smartline Publishers, pp. 1-4, 2008) Boateng, B. A.; Obeng-Ofori, D.