7 Works

Investigating Nitrate Pollution Sources and NaturalBackground in Groundwater of the Densu Basin: A Model-based Approach

George Yamoah Afrifa , Larry-pax Chegbeleh , Patrick Asamoah Sakyi , Mark Sandow Yidana , Yvonne Sena Akosua Loh , Theophilus Ansah-Narh & Evans Manu
Nitrate is one of the dominant chemical pollutants of groundwater, and there is a need to mitigate groundwater pollution in rural, urban and industrial terrains in an aquifer system. The study assesses the extent of nitrate pollution in the Densu Basin because of its predominance in agriculture and urbanized vicinities by employing robust techniques for estimating both the natural background and human-induced concentrations. The statistical methods used to estimate these concentrations are the pre-selection method,...

Escalating pyrethroid resistance in two major malaria vectors Anopheles funestus and Anopheles gambiae (s.l.) in Atatam, Southern Ghana

Leon M. J. Mugenzi, Gabriel Akosah-Brempong, Magellan Tchouakui, Benjamin D. Menze, Theofelix A. Tekoh, Micareme Tchoupo, Francis N. Nkemngo, Murielle J. Wondji, Ekene K. Nwaefuna, Michael Osae & Charles S. Wondji
Abstract Background Aggravation of insecticide resistance in malaria vectors is threatening the efforts to control malaria by reducing the efficacy of insecticide-based interventions hence needs to be closely monitored. This study investigated the intensity of insecticide resistance of two major malaria vectors An. funestus sensu stricto (s.s.) and An. gambiae sensu lato (s.l.) collected in southern Ghana and assessed the bio-efficacy of several long-lasting insecticidal nets (LLINs) against these mosquito populations. Methods The insecticide susceptibility...

Farmers’ knowledge, experience and management of fall armyworm in a major maize producing municipality in Ghana

Akua Safo, Silas Wintuma Avicor, Philip Kweku Baidoo, Patrick Addo-Fordjour, Michael Kojo Ainooson, Michael Osae, Sylvia Esther Gyan & Jerry Asalma Nboyine
Since its discovery in Ghana, the fall armyworm (FAW) has damaged maize farms resulting in yield losses. This study investigated farmers’ knowledge, practices and impact of the pest in a major maize growing municipality in Ghana. A structured questionnaire was used to obtain information from 200 randomly sampled farmers on their knowledge, practices, perceived effect and management of the FAW. FAW susceptibility to insecticides was also assessed. Although insecticide application was dominant (98%) and farmers...

Farmers’ knowledge, experience and management of fall armyworm in a major maize producing municipality in Ghana

Akua Safo, Silas Wintuma Avicor, Philip Kweku Baidoo, Patrick Addo-Fordjour, Michael Kojo Ainooson, Michael Osae, Sylvia Esther Gyan & Jerry Asalma Nboyine
Since its discovery in Ghana, the fall armyworm (FAW) has damaged maize farms resulting in yield losses. This study investigated farmers’ knowledge, practices and impact of the pest in a major maize growing municipality in Ghana. A structured questionnaire was used to obtain information from 200 randomly sampled farmers on their knowledge, practices, perceived effect and management of the FAW. FAW susceptibility to insecticides was also assessed. Although insecticide application was dominant (98%) and farmers...

Additional file 1 of Escalating pyrethroid resistance in two major malaria vectors Anopheles funestus and Anopheles gambiae (s.l.) in Atatam, Southern Ghana

Leon M. J. Mugenzi, Gabriel Akosah-Brempong, Magellan Tchouakui, Benjamin D. Menze, Theofelix A. Tekoh, Micareme Tchoupo, Francis N. Nkemngo, Murielle J. Wondji, Ekene K. Nwaefuna, Michael Osae & Charles S. Wondji
Additional file 1: Table S1. Frequency of target site mutations characterized in Anopheles gambiae (s.l.) F0 from Atatam. Table S2. Frequency of L119F-GSTe2 resistance markers among dead and alive An. funestus exposed to DDT, deltamethrin 1x, 5x and 10x. Table S3. Differential expression of metabolic resistance genes among F1 Deltamethrin 1X, 5x, 10x and unexposed mosquitoes from Atatam compared with the FANG susceptible strain. Table S4. Differential expression of metabolic and cuticular resistance genes among...

Additional file 1 of Escalating pyrethroid resistance in two major malaria vectors Anopheles funestus and Anopheles gambiae (s.l.) in Atatam, Southern Ghana

Leon M. J. Mugenzi, Gabriel Akosah-Brempong, Magellan Tchouakui, Benjamin D. Menze, Theofelix A. Tekoh, Micareme Tchoupo, Francis N. Nkemngo, Murielle J. Wondji, Ekene K. Nwaefuna, Michael Osae & Charles S. Wondji
Additional file 1: Table S1. Frequency of target site mutations characterized in Anopheles gambiae (s.l.) F0 from Atatam. Table S2. Frequency of L119F-GSTe2 resistance markers among dead and alive An. funestus exposed to DDT, deltamethrin 1x, 5x and 10x. Table S3. Differential expression of metabolic resistance genes among F1 Deltamethrin 1X, 5x, 10x and unexposed mosquitoes from Atatam compared with the FANG susceptible strain. Table S4. Differential expression of metabolic and cuticular resistance genes among...

Escalating pyrethroid resistance in two major malaria vectors Anopheles funestus and Anopheles gambiae (s.l.) in Atatam, Southern Ghana

Leon M. J. Mugenzi, Gabriel Akosah-Brempong, Magellan Tchouakui, Benjamin D. Menze, Theofelix A. Tekoh, Micareme Tchoupo, Francis N. Nkemngo, Murielle J. Wondji, Ekene K. Nwaefuna, Michael Osae & Charles S. Wondji
Abstract Background Aggravation of insecticide resistance in malaria vectors is threatening the efforts to control malaria by reducing the efficacy of insecticide-based interventions hence needs to be closely monitored. This study investigated the intensity of insecticide resistance of two major malaria vectors An. funestus sensu stricto (s.s.) and An. gambiae sensu lato (s.l.) collected in southern Ghana and assessed the bio-efficacy of several long-lasting insecticidal nets (LLINs) against these mosquito populations. Methods The insecticide susceptibility...

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  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
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