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Papers by Bernard Boateng

Research paper thumbnail of DEVELOPMENT OF Lasioderma serricorne ( F . ) ( COLEOPTERA : ANOBIIDAE ) ON DRIED ROOT AND TUBER CHIPS

The cigarette beetle (Lasioderma serricorne) successfully develops on a wide range of stored prod... more The cigarette beetle (Lasioderma serricorne) successfully develops on a wide range of stored products. This study was conducted to determine the development of the cigarette beetle on some roots and tubers namely; cassava, yam, cocoyam and sweet potato chips at laboratory conditions. The developmental period of the insect, consisting of the egg incubation period, larval, pupal and adult period, was recorded. The adult body weight, adult longevity and the amount of frass produced were also determined. The cigarette beetle was able to complete it lifecycle from the egg stage to the adult stage on all the different root and tuber chips. Sweet potato chips produced significantly better in all the variables evaluated, whereas cocoyam chips consistently served as a poor substrate for the development of the cigarette beetle. The result of the study has implication for long term post harvest storage of these roots and tuber crops as chips.

Research paper thumbnail of Dauda, Z., Ayertey, J.N. and Boateng, B.A. (2009) Effect of Bambara groundnut (Vigna subterranea (L.) Verdcourt varieties on the development of Callosobruchus maculatus Fab. (Coleoptera: Bruchidae) Journal of Arid Agriculture 18, 38-44

Research paper thumbnail of Screening of Ten Maize Varieties, Zea Mays (L.) For Resistance Against Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae) from Different Zones of Nigeria and Ghana

Ten maize varieties, Zea mays, eight from International Institute of Tropical Agriculture (IITA),... more Ten maize varieties, Zea mays, eight from International Institute of Tropical Agriculture (IITA), Ibadan and two from local market in Enugu, Nigeria were screened for resistance to Prostephanus truncatus in the laboratory. Thereafter, they were evaluated against four strains of adults of P. truncatus originating from three geographical locations in Nigeria and one from Ghana at the temperature of 29-36°C and relative humidity of 51-85%. For each type of pest, the resistant varieties were distinguished from susceptible ones in terms of adult mortality, F adult emergence, population density, body weight and size of F adults, developmental period, 1 1 percentage weight loss and damage to grain. These parameters were significantly correlated with each other using analysis of variance (ANOVA). The extent of damage, weight loss and dust produced were generally similar in both susceptible and resistant varieties. The varieties differed in their overall chemical and physical parameters and ...

Research paper thumbnail of Isah, M.D., Ayertey, J.N. and Boateng, A.B. (2009) Suitability of dried chips of Plantain, Cocoyam, Yam and Cassava for the development of the Larger Grain Borer Prostephanus truncatus (Horn) (Cloeoptera: Bostrichidae), International Journal of Pure and Applied Sciences, 3(4), 12-20

Research paper thumbnail of Decomposition and insect succession pattern of exposed domestic pig (Sus scofa L.) Carrion

Pig carrion decomposition and insect succession patterns were monitored in the dry and wet season... more Pig carrion decomposition and insect succession patterns were monitored in the dry and wet seasons at the University of Ghana, Legon in the Greater Accra Region. The sequence and composition of the local carrion visiting fauna, as well as, the rate of decomposition of the carrion and their determinant climatic factors were measured. The complete decomposition of the carrion lasted 16 and 24 days for dry and wet season, respectively. Five stages of decomposition of the cadaver namely the fresh, bloated, active decay, advanced decay and dry remains were observed. In total, 19 species of insects from 14 families: Calliphoridae, Muscidae, Dolichopodidae, Gasterophilidae, Formicidae, Histeridae, Dermestidae, Cleridae, Lycidae, Staphilinidae, Pyrrhocoridae, Saturniidae and Therevidae were collected. A few species from the family Ixodidae (Arachnidae) were also collected during the decomposition of the carrion. On account of their activity and frequency, the Calliphorid species, Lucilia ru...

Research paper thumbnail of Controlling the larger grain borer, Prostephanus truncatus in maize using plant resistance and biological control techniques

Research paper thumbnail of Developing decision-support tools for post-harvest pest management in grain stores in West Africa

Research paper thumbnail of Efficacy of neem oil and neemazal against the larger grain borer, prostephanus truncates (Horn) in stored maize

Journal of the Ghana Science Association, 2009

Research paper thumbnail of Population dynamics of Prostephanus truncatus (Horn) and Sitophilus zeamais motschulsky in a traditional barn: the influence of maize variety and season

Journal of the Ghana Science Association, 2001

Research paper thumbnail of Vers des outils de prise de décision pour la lutte contre les ravageurs post-récolte du maïs

Research paper thumbnail of Preference of and Damage to Processed Cassava Chips by Araecerus fasciculatus (Degeer)

Research paper thumbnail of Postharvest systems of selected vegetables in the Upper East and West regions of Ghana

Every Ghanaian household uses eggplant, okra, onion, pepper and tomato as well as other leafy veg... more Every Ghanaian household uses eggplant, okra, onion, pepper and tomato as well as other leafy vegetables. Its widespread usage had led to wide cultivation using different soil types. Pockets of spoilage predominate during favourable seasons. Postharvest losses up to about 50% have been documented for some of these perishables. Interventions in the postharvest subsector were in the past oriented towards isolated technical solutions with subsequent dissemination. In this survey using a structured questionnaire, the whole set of operations within the chain from production to consumption was studied for the two upper regions of Ghana. Production was basically during the dry season when there was no major farming active for the main staples. Tomato and onions had high premium thus were the main vegetables grown. Cultivation was done near dams, waterbeds or dugout for source of irrigation. The drudgery involved in cultivation restricted production to lower acreage and basically men.

Research paper thumbnail of Bioefficacy of neem oil (Calneem™), a botanical insecticide against the tropical warehouse moth, Ephestia cautella

Research paper thumbnail of Postharvest status of plantains in some selected markets in Ghana

Plantain production and marketing has been done traditionally, as the problem of food production ... more Plantain production and marketing has been done traditionally, as the problem of food production shortage during the last decade in Ghana has temporarily been solved with import substitute staple like rice. A survey of marketing and utilisation of plantain in twenty-two urban markets from five regions of Ghana revealed that fruit maturity has important criteria to all players in the plantain postharvest system. Unavailable, improper infrastructure and facilities coupled with unreliable transportation system and poor road network shorten the shelf-life thus causing rapid ripening with subsequent increase in postharvest losses. The practiced technology for enhancing ripening of fruits, though low, was appropriate and cost effective. The role of market queens in the retailing of the product had a negative effect on the rate of returns of the retailers, which contributed to about 45% of the traders being seasonal sellers. However with about 60% of respondents had basic education and their level of record and book keeping was impressive.

Research paper thumbnail of Insect diversity and succession pattern on different carrion types

Insect fauna attracted on four different types of carrion; beef, chicken, pork, and fish were con... more Insect fauna attracted on four different types of carrion; beef, chicken, pork, and fish were conducted in a cassava growing field on the campus of the University of Ghana for a period of twenty-eight days between February and March, 2005. Four stages of decomposition were recognized; fresh, bloated, decay and dry. A total of 19 insect species belonging to five orders and thirteen families were recorded. Coleoptera represented 23% of the total number of species. Diptera and Hymenoptera constituted 35% and 41% respectively while Collembola and Heteroptera a mere 1% of the insect orders that dominated the carrion fauna. Caliphoridae were the first to arrive on all four types of carrion. Five species of Histeridae, three of Formicidae and one each from Dermestidae, Scarabaeidae, Cleridae, Mycetophagidae, Scolytidae were recorded on beef, chicken, pork and fish. Representatives of four Dipteran families; Calliphoridae, Muscidae, Sarcophagidae and Tachinidae were also recorded. One species each of the families Pyrrhocoridae and Isotomidae were unique to pork and chicken respectively.

Research paper thumbnail of The effect of processing method of cassava chips on the development of Prostephanus truncatus (Horn)(Coleoptera: Bostrichidae)

Susceptibility of processed cassava chips to infestation by the Larger Grain Borer, Prostephanus ... more Susceptibility of processed cassava chips to infestation by the Larger Grain Borer, Prostephanus truncatus (Horn) was investigated in the laboratory (25-34 o C, 61-92% r. h and 12 h: 12 h light: dark regime). Chips of two varieties were variously processed by fermentation, parboiling and sun-drying and stored for different periods. About 150, 200 and 300 g of processed cassava chips in Kilner jars were artificially infested with 15 pairs of P. truncatus adults and stored for 49, 59 and 69 days respectively. Significant differences (P < 0.05) were observed in the mean numbers of adults recorded on the processed chips after 49 days of storage. Across varieties, fermented chips recorded the highest number of adults (407.0 ± 53.9), followed by 395.9 ± 34.5 and 351.0 ± 42.1 adults found on plain and sundried chips, respectively. Parboiled chips however supported the lowest number of adults (89.0 ± 16.4). The number of P. truncatus adults increased with increasing storage period on all chips. The overall mean weight loss recorded on plain, sun-dried and fermented chips were 71.5 ± 7.7%, 71.2, 6.7% and 71.7± 8.8% respectively after 69 days of storage by which time most of the chips had disintegrated completely. The lowest amount of loss, 20.9 ± 5.0%, was recorded on parboiled chips. The study showed that the practice of parboiling confers greater protection to cassava chips against infestation and losses due to P. truncatus than the other traditional fermentation and sun-drying methods.

Research paper thumbnail of Effect of nutritional content of processed cassava chips on development of Prostephanus truncatus (Horn)

Samples of four differently processed cassava chips of two varieties were analysed for their chem... more 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).

Research paper thumbnail of Toxicity of jatropha seed oil to Callosobruchus maculatus (Coleoptera: Bruchidae) and its parasitoid, Dinarmus basalis (Hymenoptera: Pteromalidae)

The susceptibility of C. maculatus and D. basalis to Jatropha seed oil was evaluated under labora... more The susceptibility of C. maculatus and D. basalis to Jatropha seed oil was evaluated under laboratory conditions. The adults of C. maculatus and D. basalis had the same susceptibility to Jatropha seed oil but the parasitoid was relatively more susceptible than its host at all treatment levels. The oil was also repellent to C. maculatus but its persistency declined from 15 to 60 days in storage. The eggs of C. maculatus were comparatively more susceptible to the Jatropha seed oil than those of the parasitoid due to the protection afforded by the grain. However, the larvae and pupae of C. maculatus showed a relatively lower susceptibility to the oil. It is possible to incorporate the oil in a well designed pest management programme taking advantage of the short persistency of the oil on grains and its relatively ineffectiveness against the C. maculatus pupae developing inside the grain.

Research paper thumbnail of DEVELOPMENT OF Lasioderma serricorne ( F . ) ( COLEOPTERA : ANOBIIDAE ) ON DRIED ROOT AND TUBER CHIPS

The cigarette beetle (Lasioderma serricorne) successfully develops on a wide range of stored prod... more The cigarette beetle (Lasioderma serricorne) successfully develops on a wide range of stored products. This study was conducted to determine the development of the cigarette beetle on some roots and tubers namely; cassava, yam, cocoyam and sweet potato chips at laboratory conditions. The developmental period of the insect, consisting of the egg incubation period, larval, pupal and adult period, was recorded. The adult body weight, adult longevity and the amount of frass produced were also determined. The cigarette beetle was able to complete it lifecycle from the egg stage to the adult stage on all the different root and tuber chips. Sweet potato chips produced significantly better in all the variables evaluated, whereas cocoyam chips consistently served as a poor substrate for the development of the cigarette beetle. The result of the study has implication for long term post harvest storage of these roots and tuber crops as chips.

Research paper thumbnail of Dauda, Z., Ayertey, J.N. and Boateng, B.A. (2009) Effect of Bambara groundnut (Vigna subterranea (L.) Verdcourt varieties on the development of Callosobruchus maculatus Fab. (Coleoptera: Bruchidae) Journal of Arid Agriculture 18, 38-44

Research paper thumbnail of Screening of Ten Maize Varieties, Zea Mays (L.) For Resistance Against Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae) from Different Zones of Nigeria and Ghana

Ten maize varieties, Zea mays, eight from International Institute of Tropical Agriculture (IITA),... more Ten maize varieties, Zea mays, eight from International Institute of Tropical Agriculture (IITA), Ibadan and two from local market in Enugu, Nigeria were screened for resistance to Prostephanus truncatus in the laboratory. Thereafter, they were evaluated against four strains of adults of P. truncatus originating from three geographical locations in Nigeria and one from Ghana at the temperature of 29-36°C and relative humidity of 51-85%. For each type of pest, the resistant varieties were distinguished from susceptible ones in terms of adult mortality, F adult emergence, population density, body weight and size of F adults, developmental period, 1 1 percentage weight loss and damage to grain. These parameters were significantly correlated with each other using analysis of variance (ANOVA). The extent of damage, weight loss and dust produced were generally similar in both susceptible and resistant varieties. The varieties differed in their overall chemical and physical parameters and ...

Research paper thumbnail of Isah, M.D., Ayertey, J.N. and Boateng, A.B. (2009) Suitability of dried chips of Plantain, Cocoyam, Yam and Cassava for the development of the Larger Grain Borer Prostephanus truncatus (Horn) (Cloeoptera: Bostrichidae), International Journal of Pure and Applied Sciences, 3(4), 12-20

Research paper thumbnail of Decomposition and insect succession pattern of exposed domestic pig (Sus scofa L.) Carrion

Pig carrion decomposition and insect succession patterns were monitored in the dry and wet season... more Pig carrion decomposition and insect succession patterns were monitored in the dry and wet seasons at the University of Ghana, Legon in the Greater Accra Region. The sequence and composition of the local carrion visiting fauna, as well as, the rate of decomposition of the carrion and their determinant climatic factors were measured. The complete decomposition of the carrion lasted 16 and 24 days for dry and wet season, respectively. Five stages of decomposition of the cadaver namely the fresh, bloated, active decay, advanced decay and dry remains were observed. In total, 19 species of insects from 14 families: Calliphoridae, Muscidae, Dolichopodidae, Gasterophilidae, Formicidae, Histeridae, Dermestidae, Cleridae, Lycidae, Staphilinidae, Pyrrhocoridae, Saturniidae and Therevidae were collected. A few species from the family Ixodidae (Arachnidae) were also collected during the decomposition of the carrion. On account of their activity and frequency, the Calliphorid species, Lucilia ru...

Research paper thumbnail of Controlling the larger grain borer, Prostephanus truncatus in maize using plant resistance and biological control techniques

Research paper thumbnail of Developing decision-support tools for post-harvest pest management in grain stores in West Africa

Research paper thumbnail of Efficacy of neem oil and neemazal against the larger grain borer, prostephanus truncates (Horn) in stored maize

Journal of the Ghana Science Association, 2009

Research paper thumbnail of Population dynamics of Prostephanus truncatus (Horn) and Sitophilus zeamais motschulsky in a traditional barn: the influence of maize variety and season

Journal of the Ghana Science Association, 2001

Research paper thumbnail of Vers des outils de prise de décision pour la lutte contre les ravageurs post-récolte du maïs

Research paper thumbnail of Preference of and Damage to Processed Cassava Chips by Araecerus fasciculatus (Degeer)

Research paper thumbnail of Postharvest systems of selected vegetables in the Upper East and West regions of Ghana

Every Ghanaian household uses eggplant, okra, onion, pepper and tomato as well as other leafy veg... more Every Ghanaian household uses eggplant, okra, onion, pepper and tomato as well as other leafy vegetables. Its widespread usage had led to wide cultivation using different soil types. Pockets of spoilage predominate during favourable seasons. Postharvest losses up to about 50% have been documented for some of these perishables. Interventions in the postharvest subsector were in the past oriented towards isolated technical solutions with subsequent dissemination. In this survey using a structured questionnaire, the whole set of operations within the chain from production to consumption was studied for the two upper regions of Ghana. Production was basically during the dry season when there was no major farming active for the main staples. Tomato and onions had high premium thus were the main vegetables grown. Cultivation was done near dams, waterbeds or dugout for source of irrigation. The drudgery involved in cultivation restricted production to lower acreage and basically men.

Research paper thumbnail of Bioefficacy of neem oil (Calneem™), a botanical insecticide against the tropical warehouse moth, Ephestia cautella

Research paper thumbnail of Postharvest status of plantains in some selected markets in Ghana

Plantain production and marketing has been done traditionally, as the problem of food production ... more Plantain production and marketing has been done traditionally, as the problem of food production shortage during the last decade in Ghana has temporarily been solved with import substitute staple like rice. A survey of marketing and utilisation of plantain in twenty-two urban markets from five regions of Ghana revealed that fruit maturity has important criteria to all players in the plantain postharvest system. Unavailable, improper infrastructure and facilities coupled with unreliable transportation system and poor road network shorten the shelf-life thus causing rapid ripening with subsequent increase in postharvest losses. The practiced technology for enhancing ripening of fruits, though low, was appropriate and cost effective. The role of market queens in the retailing of the product had a negative effect on the rate of returns of the retailers, which contributed to about 45% of the traders being seasonal sellers. However with about 60% of respondents had basic education and their level of record and book keeping was impressive.

Research paper thumbnail of Insect diversity and succession pattern on different carrion types

Insect fauna attracted on four different types of carrion; beef, chicken, pork, and fish were con... more Insect fauna attracted on four different types of carrion; beef, chicken, pork, and fish were conducted in a cassava growing field on the campus of the University of Ghana for a period of twenty-eight days between February and March, 2005. Four stages of decomposition were recognized; fresh, bloated, decay and dry. A total of 19 insect species belonging to five orders and thirteen families were recorded. Coleoptera represented 23% of the total number of species. Diptera and Hymenoptera constituted 35% and 41% respectively while Collembola and Heteroptera a mere 1% of the insect orders that dominated the carrion fauna. Caliphoridae were the first to arrive on all four types of carrion. Five species of Histeridae, three of Formicidae and one each from Dermestidae, Scarabaeidae, Cleridae, Mycetophagidae, Scolytidae were recorded on beef, chicken, pork and fish. Representatives of four Dipteran families; Calliphoridae, Muscidae, Sarcophagidae and Tachinidae were also recorded. One species each of the families Pyrrhocoridae and Isotomidae were unique to pork and chicken respectively.

Research paper thumbnail of The effect of processing method of cassava chips on the development of Prostephanus truncatus (Horn)(Coleoptera: Bostrichidae)

Susceptibility of processed cassava chips to infestation by the Larger Grain Borer, Prostephanus ... more Susceptibility of processed cassava chips to infestation by the Larger Grain Borer, Prostephanus truncatus (Horn) was investigated in the laboratory (25-34 o C, 61-92% r. h and 12 h: 12 h light: dark regime). Chips of two varieties were variously processed by fermentation, parboiling and sun-drying and stored for different periods. About 150, 200 and 300 g of processed cassava chips in Kilner jars were artificially infested with 15 pairs of P. truncatus adults and stored for 49, 59 and 69 days respectively. Significant differences (P < 0.05) were observed in the mean numbers of adults recorded on the processed chips after 49 days of storage. Across varieties, fermented chips recorded the highest number of adults (407.0 ± 53.9), followed by 395.9 ± 34.5 and 351.0 ± 42.1 adults found on plain and sundried chips, respectively. Parboiled chips however supported the lowest number of adults (89.0 ± 16.4). The number of P. truncatus adults increased with increasing storage period on all chips. The overall mean weight loss recorded on plain, sun-dried and fermented chips were 71.5 ± 7.7%, 71.2, 6.7% and 71.7± 8.8% respectively after 69 days of storage by which time most of the chips had disintegrated completely. The lowest amount of loss, 20.9 ± 5.0%, was recorded on parboiled chips. The study showed that the practice of parboiling confers greater protection to cassava chips against infestation and losses due to P. truncatus than the other traditional fermentation and sun-drying methods.

Research paper thumbnail of Effect of nutritional content of processed cassava chips on development of Prostephanus truncatus (Horn)

Samples of four differently processed cassava chips of two varieties were analysed for their chem... more 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).

Research paper thumbnail of Toxicity of jatropha seed oil to Callosobruchus maculatus (Coleoptera: Bruchidae) and its parasitoid, Dinarmus basalis (Hymenoptera: Pteromalidae)

The susceptibility of C. maculatus and D. basalis to Jatropha seed oil was evaluated under labora... more The susceptibility of C. maculatus and D. basalis to Jatropha seed oil was evaluated under laboratory conditions. The adults of C. maculatus and D. basalis had the same susceptibility to Jatropha seed oil but the parasitoid was relatively more susceptible than its host at all treatment levels. The oil was also repellent to C. maculatus but its persistency declined from 15 to 60 days in storage. The eggs of C. maculatus were comparatively more susceptible to the Jatropha seed oil than those of the parasitoid due to the protection afforded by the grain. However, the larvae and pupae of C. maculatus showed a relatively lower susceptibility to the oil. It is possible to incorporate the oil in a well designed pest management programme taking advantage of the short persistency of the oil on grains and its relatively ineffectiveness against the C. maculatus pupae developing inside the grain.