The Experts below are selected from a list of 3225 Experts worldwide ranked by ideXlab platform
A P Maerere - One of the best experts on this subject based on the ideXlab platform.
-
host range and distribution of fruit infesting pestiferous fruit flies diptera tephritidae in selected areas of central tanzania
Bulletin of Entomological Research, 2009Co-Authors: M Mwatawala, Rhodes H Makundi, M De Meyer, A P MaerereAbstract:The host range of major fruit fly pests in Central Tanzania was evaluated from October 2004 to October 2006. Samples of 48 potential hosts were collected and incubated for fruit fly emergence. Bactrocera invadens was the dominant species in incidence expressed as the ratio of infested to total number samples collected, as well as infestation rate, expressed as number of flies emerging per unit weight. Eight new host Fruits are reported. Infestation by native pests, such as Ceratitis capitata and C. cosyra , was minor compared to B. invadens . Ceratitis rosa was the dominant species in Temperate Fruits, and Cucurbitaceae were mainly infested by Bactrocera cucurbitae , a specialized cucurbit feeder. Among commercial Fruits, high infestation incidences were observed in mango and guava, but they decreased throughout the fruiting season. Low infestation rates were observed in all Citrus species and in avocado, indicating these Fruits as poor hosts for the studied fruit fly pests in this region. Widespread availability and abundance of fruit species studied here ensures year-round breeding of B. invadens . Seasonal infestation differs, with mango being the most important host in October to January, while guava being important from February to August. Tropical almond showed very high incidence and infestation rate for B. invadens and might act as an important reservoir host, bridging the fruiting seasons of mango and guava. Soursop acts as an important host for C. cosyra after the mango season. Ceratitis capitata is a pest of minor importance of the commercial Fruits studied in this region.
-
biodiversity of fruit flies diptera tephritidae in orchards in different agro ecological zones of the morogoro region tanzania
Fruits, 2006Co-Authors: M Mwatawala, Marc De Meyer, Rhodes H Makundi, A P MaerereAbstract:Introduction. Fruit flies (Diptera, Tephritidae) are among the major constraints in commercial horticulture in many African developing countries. Knowledge of the tephritid spectrum in any given area is a prerequisite for the development of an IPM program to alleviate the pest problem. We studied the fruit fly diversity in four main agro-ecological zones which are significant fruit-producing areas in the Morogoro Region, Tanzania. Materials and methods. Fruit fly diversity was investigated for one year (October 2004 - October 2005). Parapheromones, synthetic food attractant and protein-bait traps were used to trap the flies at the different locations in Morogoro region, Tanzania. One mixed orchard was selected at each of four locations representing the different agro-ecological zones of the region. Results. The recently intro- duced alien species, Bactrocera invadens, and three indigenous pest species, Ceratitis rosa, Dacus bivittatus and D. punctatifrons, were found at all the four sites, while Bactrocera cucurbitae, Ceratitis cosyra, Dacus chiwira and D. humeralis were found in three out of the four sites. The Sokoine University of Agriculture (SUA) Horticulture Unit and Mikese sites had the highest species diversity while the Mkindo and Nyandira sites had the lowest diversity. The between-habitats diversity (Beta diversity) was similar among the SUA, Mkindo and Mikese sites. Only the Nyandira site had a higher dissimilarity in comparison with the other three sites. Discussion. The most abundant species at low- and mid-elevation sites was Bactrocera invadens while, at high elevation, Ceratitis rosa was the dominant species. Protein-baited traps attracted the highest diversity of fruit flies in comparison with the more specific parapheromones. The synthetic food attractant (three-component lure) was less efficient compared with the protein bait. The large dissimilarity at the Nyan- dira site is probably due to the different types of host Fruits found and grown in high altitude areas (mainly Temperate Fruits). Fruit fly species associated with these types of Fruits, e.g., Ceratitis rubivora and Tri- rhithrum coffeae, were found only at this site. Tanzania / fruit trees / Tephritidae / fruit flies / biodiversity / Ceratitis / Bactrocera / Dacus / surveys / traps / identification
Delia B. Rodriguez-amaya - One of the best experts on this subject based on the ideXlab platform.
-
Occurrence of cis-Isomers of Provitamin A in Brazilian Fruits
Journal of Agricultural and Food Chemistry, 1994Co-Authors: Helena Teixeira Godoy, Delia B. Rodriguez-amayaAbstract:Brazil has a wide variety of tropical, subtropical, and Temperate Fruits with widely differing carotenoid compositions, providing a good setting for investigating the natural occurrence of cis-isomers of provitamins. Seventy-five samples were analyzed. The Fruits could be classified into two main groups: (1) those having β-carotene as the principal provitamin and (2) those with β-cryptoxanthin as the major provitamin. Some Fruits also had α-carotene, γ-carotene, α-cryptoxanthin, and β-apo-10'-carotenal, usually at low levels. cis-Isomers were not found in caja, papaya (two cultivars), passion fruit, pitanga, and West Indian cherry. Traces of 13-cis-β-carotene were found in some samples of loquat, mango (two cultivars), and piqui
M Mwatawala - One of the best experts on this subject based on the ideXlab platform.
-
host range and distribution of fruit infesting pestiferous fruit flies diptera tephritidae in selected areas of central tanzania
Bulletin of Entomological Research, 2009Co-Authors: M Mwatawala, Rhodes H Makundi, M De Meyer, A P MaerereAbstract:The host range of major fruit fly pests in Central Tanzania was evaluated from October 2004 to October 2006. Samples of 48 potential hosts were collected and incubated for fruit fly emergence. Bactrocera invadens was the dominant species in incidence expressed as the ratio of infested to total number samples collected, as well as infestation rate, expressed as number of flies emerging per unit weight. Eight new host Fruits are reported. Infestation by native pests, such as Ceratitis capitata and C. cosyra , was minor compared to B. invadens . Ceratitis rosa was the dominant species in Temperate Fruits, and Cucurbitaceae were mainly infested by Bactrocera cucurbitae , a specialized cucurbit feeder. Among commercial Fruits, high infestation incidences were observed in mango and guava, but they decreased throughout the fruiting season. Low infestation rates were observed in all Citrus species and in avocado, indicating these Fruits as poor hosts for the studied fruit fly pests in this region. Widespread availability and abundance of fruit species studied here ensures year-round breeding of B. invadens . Seasonal infestation differs, with mango being the most important host in October to January, while guava being important from February to August. Tropical almond showed very high incidence and infestation rate for B. invadens and might act as an important reservoir host, bridging the fruiting seasons of mango and guava. Soursop acts as an important host for C. cosyra after the mango season. Ceratitis capitata is a pest of minor importance of the commercial Fruits studied in this region.
-
biodiversity of fruit flies diptera tephritidae in orchards in different agro ecological zones of the morogoro region tanzania
Fruits, 2006Co-Authors: M Mwatawala, Marc De Meyer, Rhodes H Makundi, A P MaerereAbstract:Introduction. Fruit flies (Diptera, Tephritidae) are among the major constraints in commercial horticulture in many African developing countries. Knowledge of the tephritid spectrum in any given area is a prerequisite for the development of an IPM program to alleviate the pest problem. We studied the fruit fly diversity in four main agro-ecological zones which are significant fruit-producing areas in the Morogoro Region, Tanzania. Materials and methods. Fruit fly diversity was investigated for one year (October 2004 - October 2005). Parapheromones, synthetic food attractant and protein-bait traps were used to trap the flies at the different locations in Morogoro region, Tanzania. One mixed orchard was selected at each of four locations representing the different agro-ecological zones of the region. Results. The recently intro- duced alien species, Bactrocera invadens, and three indigenous pest species, Ceratitis rosa, Dacus bivittatus and D. punctatifrons, were found at all the four sites, while Bactrocera cucurbitae, Ceratitis cosyra, Dacus chiwira and D. humeralis were found in three out of the four sites. The Sokoine University of Agriculture (SUA) Horticulture Unit and Mikese sites had the highest species diversity while the Mkindo and Nyandira sites had the lowest diversity. The between-habitats diversity (Beta diversity) was similar among the SUA, Mkindo and Mikese sites. Only the Nyandira site had a higher dissimilarity in comparison with the other three sites. Discussion. The most abundant species at low- and mid-elevation sites was Bactrocera invadens while, at high elevation, Ceratitis rosa was the dominant species. Protein-baited traps attracted the highest diversity of fruit flies in comparison with the more specific parapheromones. The synthetic food attractant (three-component lure) was less efficient compared with the protein bait. The large dissimilarity at the Nyan- dira site is probably due to the different types of host Fruits found and grown in high altitude areas (mainly Temperate Fruits). Fruit fly species associated with these types of Fruits, e.g., Ceratitis rubivora and Tri- rhithrum coffeae, were found only at this site. Tanzania / fruit trees / Tephritidae / fruit flies / biodiversity / Ceratitis / Bactrocera / Dacus / surveys / traps / identification
Helena Teixeira Godoy - One of the best experts on this subject based on the ideXlab platform.
-
Occurrence of cis-Isomers of Provitamin A in Brazilian Fruits
Journal of Agricultural and Food Chemistry, 1994Co-Authors: Helena Teixeira Godoy, Delia B. Rodriguez-amayaAbstract:Brazil has a wide variety of tropical, subtropical, and Temperate Fruits with widely differing carotenoid compositions, providing a good setting for investigating the natural occurrence of cis-isomers of provitamins. Seventy-five samples were analyzed. The Fruits could be classified into two main groups: (1) those having β-carotene as the principal provitamin and (2) those with β-cryptoxanthin as the major provitamin. Some Fruits also had α-carotene, γ-carotene, α-cryptoxanthin, and β-apo-10'-carotenal, usually at low levels. cis-Isomers were not found in caja, papaya (two cultivars), passion fruit, pitanga, and West Indian cherry. Traces of 13-cis-β-carotene were found in some samples of loquat, mango (two cultivars), and piqui
Rhodes H Makundi - One of the best experts on this subject based on the ideXlab platform.
-
host range and distribution of fruit infesting pestiferous fruit flies diptera tephritidae in selected areas of central tanzania
Bulletin of Entomological Research, 2009Co-Authors: M Mwatawala, Rhodes H Makundi, M De Meyer, A P MaerereAbstract:The host range of major fruit fly pests in Central Tanzania was evaluated from October 2004 to October 2006. Samples of 48 potential hosts were collected and incubated for fruit fly emergence. Bactrocera invadens was the dominant species in incidence expressed as the ratio of infested to total number samples collected, as well as infestation rate, expressed as number of flies emerging per unit weight. Eight new host Fruits are reported. Infestation by native pests, such as Ceratitis capitata and C. cosyra , was minor compared to B. invadens . Ceratitis rosa was the dominant species in Temperate Fruits, and Cucurbitaceae were mainly infested by Bactrocera cucurbitae , a specialized cucurbit feeder. Among commercial Fruits, high infestation incidences were observed in mango and guava, but they decreased throughout the fruiting season. Low infestation rates were observed in all Citrus species and in avocado, indicating these Fruits as poor hosts for the studied fruit fly pests in this region. Widespread availability and abundance of fruit species studied here ensures year-round breeding of B. invadens . Seasonal infestation differs, with mango being the most important host in October to January, while guava being important from February to August. Tropical almond showed very high incidence and infestation rate for B. invadens and might act as an important reservoir host, bridging the fruiting seasons of mango and guava. Soursop acts as an important host for C. cosyra after the mango season. Ceratitis capitata is a pest of minor importance of the commercial Fruits studied in this region.
-
biodiversity of fruit flies diptera tephritidae in orchards in different agro ecological zones of the morogoro region tanzania
Fruits, 2006Co-Authors: M Mwatawala, Marc De Meyer, Rhodes H Makundi, A P MaerereAbstract:Introduction. Fruit flies (Diptera, Tephritidae) are among the major constraints in commercial horticulture in many African developing countries. Knowledge of the tephritid spectrum in any given area is a prerequisite for the development of an IPM program to alleviate the pest problem. We studied the fruit fly diversity in four main agro-ecological zones which are significant fruit-producing areas in the Morogoro Region, Tanzania. Materials and methods. Fruit fly diversity was investigated for one year (October 2004 - October 2005). Parapheromones, synthetic food attractant and protein-bait traps were used to trap the flies at the different locations in Morogoro region, Tanzania. One mixed orchard was selected at each of four locations representing the different agro-ecological zones of the region. Results. The recently intro- duced alien species, Bactrocera invadens, and three indigenous pest species, Ceratitis rosa, Dacus bivittatus and D. punctatifrons, were found at all the four sites, while Bactrocera cucurbitae, Ceratitis cosyra, Dacus chiwira and D. humeralis were found in three out of the four sites. The Sokoine University of Agriculture (SUA) Horticulture Unit and Mikese sites had the highest species diversity while the Mkindo and Nyandira sites had the lowest diversity. The between-habitats diversity (Beta diversity) was similar among the SUA, Mkindo and Mikese sites. Only the Nyandira site had a higher dissimilarity in comparison with the other three sites. Discussion. The most abundant species at low- and mid-elevation sites was Bactrocera invadens while, at high elevation, Ceratitis rosa was the dominant species. Protein-baited traps attracted the highest diversity of fruit flies in comparison with the more specific parapheromones. The synthetic food attractant (three-component lure) was less efficient compared with the protein bait. The large dissimilarity at the Nyan- dira site is probably due to the different types of host Fruits found and grown in high altitude areas (mainly Temperate Fruits). Fruit fly species associated with these types of Fruits, e.g., Ceratitis rubivora and Tri- rhithrum coffeae, were found only at this site. Tanzania / fruit trees / Tephritidae / fruit flies / biodiversity / Ceratitis / Bactrocera / Dacus / surveys / traps / identification
