The Experts below are selected from a list of 63624 Experts worldwide ranked by ideXlab platform
Krissana Treesilvattanakul - One of the best experts on this subject based on the ideXlab platform.
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deterministic factors of thai Cassava prices multi uses of Cassava from food feed and fuel affecting on thai Cassava price volatility
KnE Life Sciences, 2016Co-Authors: Krissana TreesilvattanakulAbstract:Cassava (Manihot esculaenta Crantz) is one of the world important carbohydrate and calorie crops. The significance of Cassava lies hidden in the uses of Cassava products ranging from food to industrial sectors. In recent years, the Thai Cassava price is markedly fluctuated and became a challenge for farmers, collectors, and manufacturers of Cassava products to manage their production and processing. This paper examines factors considerably influencing the volatility of Thai Cassava price. We further attempt in reporting the weighted importance of each factor including the pattern of their relationship with respect to Cassava price. Research methodology will be conducted into two dimensions: from the perspective of only Cassava price and from the combination of Cassava price and its influencing factors. The result shows the seasonality nature of Cassava price, while the fluctuation is caused by the several interrelated factors. Keywords : Cassava, Price, Utilization, Thailand.
G Thottappilly - One of the best experts on this subject based on the ideXlab platform.
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molecular characterization of whitefly bemisia tabaci hemiptera aleyrodidae populations infesting Cassava
Bulletin of Entomological Research, 2003Co-Authors: I Abdullahi, S Winter, G I Atiri, G ThottappillyAbstract:Bemisia tabaci (Gennadius) populations, collected from Cassava and other plants in major Cassava-cultivation areas of Sub-saharan Africa and from elsewhere around the world, were studied to determine their biotype status and genetic variation. Random amplified polymorphic DNA–polymerase chain reaction (RAPD–PCR) markers were used to examine the genetic structure of the populations. The dendogram obtained using the neighbour joining method (NJ) split the Cassava-associated populations from the non-Cassava types with a 100% bootstrap probability. Analysis of molecular variance (AMOVA) of the RAPD fragments revealed that 63.2% of the total variation was attributable to differences among populations, while the differences among groups (host) and within populations accounted for 27.1 and 9.8% respectively. Analysis of the internally transcribed spacer region I (ITS 1) of the ribosomal DNA confirmed that the Cassava populations of B. tabaci populations were distinct from non-Cassava populations. Experiments to establish whitefly populations on various host plants revealed that Cassava-associated populations were restricted to Cassava only, whereas B. tabaci from other hosts were polyphagous but did not colonize Cassava. Hence, populations of B. tabaci from Cassava in Africa represent a distinct group.
Rayapati A. Naidu - One of the best experts on this subject based on the ideXlab platform.
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Alternate hosts of African Cassava mosaic virus and East African Cassava mosaic Cameroon virus in Nigeria
Archives of Virology, 2008Co-Authors: Olufemi J. Alabi, Francis O. Ogbe, Ranajit Bandyopadhyay, P. Lava Kumar, Alfred G. O. Dixon, Jaqueline D’a. Hughes, Rayapati A. NaiduAbstract:Cassava mosaic disease (CMD) caused by African Cassava mosaic virus (ACMV) and East African Cassava mosaic Cameroon virus (EACMCV) is the major constraint to Cassava production in Nigeria. Sequences of the DNA-A component of ACMV and EACMCV isolates from leguminous plant species ( Senna occidentalis , Leucana leucocephala and Glycine max ), castor oil plant ( Ricinus communis ), a weed host ( Combretum confertum ) and a wild species of Cassava ( Manihot glaziovii ) were determined. All ACMV isolates from these hosts showed 96–98% nucleotide sequence identity with Cassava isolates from West Africa. EACMCV was found only in four hosts ( S. occidentalis , L. leucocephala , C. confertum , M. glaziovii ), and sequences of these isolates showed 96–99% identity with Cassava isolates from West Africa. These results provide definitive evidence for the natural occurrence of ACMV and EACMCV in plant species besides Cassava.
I Abdullahi - One of the best experts on this subject based on the ideXlab platform.
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molecular characterization of whitefly bemisia tabaci hemiptera aleyrodidae populations infesting Cassava
Bulletin of Entomological Research, 2003Co-Authors: I Abdullahi, S Winter, G I Atiri, G ThottappillyAbstract:Bemisia tabaci (Gennadius) populations, collected from Cassava and other plants in major Cassava-cultivation areas of Sub-saharan Africa and from elsewhere around the world, were studied to determine their biotype status and genetic variation. Random amplified polymorphic DNA–polymerase chain reaction (RAPD–PCR) markers were used to examine the genetic structure of the populations. The dendogram obtained using the neighbour joining method (NJ) split the Cassava-associated populations from the non-Cassava types with a 100% bootstrap probability. Analysis of molecular variance (AMOVA) of the RAPD fragments revealed that 63.2% of the total variation was attributable to differences among populations, while the differences among groups (host) and within populations accounted for 27.1 and 9.8% respectively. Analysis of the internally transcribed spacer region I (ITS 1) of the ribosomal DNA confirmed that the Cassava populations of B. tabaci populations were distinct from non-Cassava populations. Experiments to establish whitefly populations on various host plants revealed that Cassava-associated populations were restricted to Cassava only, whereas B. tabaci from other hosts were polyphagous but did not colonize Cassava. Hence, populations of B. tabaci from Cassava in Africa represent a distinct group.
Olufemi J. Alabi - One of the best experts on this subject based on the ideXlab platform.
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Alternate hosts of African Cassava mosaic virus and East African Cassava mosaic Cameroon virus in Nigeria
Archives of Virology, 2008Co-Authors: Olufemi J. Alabi, Francis O. Ogbe, Ranajit Bandyopadhyay, P. Lava Kumar, Alfred G. O. Dixon, Jaqueline D’a. Hughes, Rayapati A. NaiduAbstract:Cassava mosaic disease (CMD) caused by African Cassava mosaic virus (ACMV) and East African Cassava mosaic Cameroon virus (EACMCV) is the major constraint to Cassava production in Nigeria. Sequences of the DNA-A component of ACMV and EACMCV isolates from leguminous plant species ( Senna occidentalis , Leucana leucocephala and Glycine max ), castor oil plant ( Ricinus communis ), a weed host ( Combretum confertum ) and a wild species of Cassava ( Manihot glaziovii ) were determined. All ACMV isolates from these hosts showed 96–98% nucleotide sequence identity with Cassava isolates from West Africa. EACMCV was found only in four hosts ( S. occidentalis , L. leucocephala , C. confertum , M. glaziovii ), and sequences of these isolates showed 96–99% identity with Cassava isolates from West Africa. These results provide definitive evidence for the natural occurrence of ACMV and EACMCV in plant species besides Cassava.
