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Journal Article 2016

Autor: Bayissa, W. Ekesi, S. Mohamed, S.A. Kaaya, G.P. Wagacha, J.M. Hanna, R. Maniania, N.K.

Aphids are regarded as important pest problems of vegetable crops worldwide. Most vegetable growers in sub-Saharan Africa heavily rely on synthetic chemical insecticides for aphids’ control. Fungus-based biopesticides are being considered as alternatives to chemical insecticides. This study evalu...

Enlace original: https://cgspace.cgiar.org/handle/10568/77592

Investigación en Agricultura
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Bayissa, W. ,  Ekesi, S. ,  Mohamed, S.A. ,  Kaaya, G.P. ,  Wagacha, J.M. ,  Hanna, R. ,  Maniania, N.K. ,  [Selection of fungal isolates for virulence against three aphid pest species of crucifers and okra] ,  Selection of fungal isolates for virulence against three aphid pest species of crucifers and okra
Journal Article 2016-08

Autor: Singh, A. Zytynska, S.E. Hanna, R. Weisser, W.W.

Aphids are pest species of many crops and biocontrol methods are often ineffective. Ant–aphid associations can be mutualistic or antagonistic, with ants increasing or reducing aphid numbers. Within-species plant variation or other herbivores may further influence these ant–aphid interactions. Okr...

Enlace original: https://cgspace.cgiar.org/handle/10568/77461

Investigación en Agricultura
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Singh, A. ,  Zytynska, S.E. ,  Hanna, R. ,  Weisser, W.W. ,  [Ant attendance of the cotton aphid is beneficial for okra plants: deciphering multitrophic interactions] ,  Ant attendance of the cotton aphid is beneficial for okra plants: deciphering multitrophic interactions
Journal Article 2016

Autor: Abang, A.F. Srinivasan, R. Kekeunou, S. Yeboah, M. Hanna, R. Lin, M.Y. Tenkouano, A. Bilong-Bilong, C.F.

The cotton aphid (Aphis gossypii) is one of the major pests of okra. Eleven okra varieties collected from farmers’ fields in Cameroon and four aphid-resistant accessions from The World Vegetable Center (AVRDC, Asian Vegetable Research and Development Center) were evaluated from October 2012 to Ma...

Enlace original: https://cgspace.cgiar.org/handle/10568/77331

Investigación en Agricultura
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Abang, A.F. ,  Srinivasan, R. ,  Kekeunou, S. ,  Yeboah, M. ,  Hanna, R. ,  Lin, M.Y. ,  Tenkouano, A. ,  Bilong-Bilong, C.F. ,  [Relationship of phenotypic structures and allelochemical compounds of okra (Abelmoschus spp.) to resistance against Aphis gossypii Glover] ,  Relationship of phenotypic structures and allelochemical compounds of okra (Abelmoschus spp.) to resistance against Aphis gossypii Glover
Journal Article 2014

Autor: Njukwe, E. Onadipe, O. Amadou Thierno, D. Hanna, R. Kirscht, H. Maziya-Dixon, B.B. Araki, S. Ngue-Bissa, T.

The study was conducted in three regions (Southwest and Littoral, South and Centre, West and Northwest) of Cameroon to document cassava processed products andtoassess processing constraints among small-holder farmers. A total of twelve small-scale processing units and five marketer...

Enlace original: https://cgspace.cgiar.org/handle/10568/75905

Investigación en Agricultura
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Njukwe, E. ,  Onadipe, O. ,  Amadou Thierno, D. ,  Hanna, R. ,  Kirscht, H. ,  Maziya-Dixon, B.B. ,  Araki, S. ,  Ngue-Bissa, T. ,  [Cassava processing among smallholder farmers in Cameroon: opportunities and challenges] ,  Cassava processing among smallholder farmers in Cameroon: opportunities and challenges
Journal Article 2015

Autor: Mbong, G.A. Fokunang, C.N. Manju, E.B. Njukeng, A.P. Tembe-Fokunang, E.A. Hanna, R.
Enlace original: https://cgspace.cgiar.org/handle/10568/73018

Investigación en Agricultura
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Mbong, G.A. ,  Fokunang, C.N. ,  Manju, E.B. ,  Njukeng, A.P. ,  Tembe-Fokunang, E.A. ,  Hanna, R. ,  [Mycelia growth and sporulation of Phytophthora colocasiae isolates under selected conditions] ,  Mycelia growth and sporulation of Phytophthora colocasiae isolates under selected conditions
Journal Article 2015

Autor: Fotso, A.K. Hanna, R. Tindo, M. Doumtsop, A. Nagel, P.
Enlace original: https://cgspace.cgiar.org/handle/10568/72977

Investigación en Agricultura
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Fotso, A.K. ,  Hanna, R. ,  Tindo, M. ,  Doumtsop, A. ,  Nagel, P. ,  [How plants and honeydewproducing hemipterans affect ant species richness and structure in a tropical forest zone] ,  How plants and honeydewproducing hemipterans affect ant species richness and structure in a tropical forest zone
Journal Article 2018-01-01

Autor: Fuller, T.L. Clee, P.R.S. Njabo, K.Y. Tróchez, A. Morgan, K. Meñe, D.B. Anthony, N.M. Gonder, M.K. Allen, W.R. Hanna, R. Smith, T.B.

Although a number of recent studies suggest that climate associated shifts in agriculture are affecting social and economic systems, there have been relatively few studies of these effects in Africa. Such studies would be particularly useful in Central Africa, where the impacts of climate warming...

Enlace original: https://cgspace.cgiar.org/handle/10568/87985

Investigación en Agricultura
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Fuller, T.L. ,  Clee, P.R.S. ,  Njabo, K.Y. ,  Tróchez, A. ,  Morgan, K. ,  Meñe, D.B. ,  Anthony, N.M. ,  Gonder, M.K. ,  Allen, W.R. ,  Hanna, R. ,  Smith, T.B. ,  [Climate warming causes declines in crop yields and lowers school attendance rates in Central Africa] ,  Climate warming causes declines in crop yields and lowers school attendance rates in Central Africa
Journal Article 2015

Autor: Fotso Kuate, A. Hanna, R. Tindo, M. Nanga, S. Nagel, P.

Ants have been shown as particularly affected by land disturbance through deforestation and conversion of forest to agriculture. The effect of land use change on ant diversity in the Congo Basin is not well known. We conducted intensive sampling along a gradient of increasing vegetation disturban...

Enlace original: https://cgspace.cgiar.org/handle/10568/74448

Investigación en Agricultura
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Fotso Kuate, A. ,  Hanna, R. ,  Tindo, M. ,  Nanga, S. ,  Nagel, P. ,  [Ant diversity in dominant vegetation types of southern Cameroon] ,  Ant diversity in dominant vegetation types of southern Cameroon
Journal Article 2015

Autor: Hanna, R. Kuate, A.F. Nanga, S.N. Tindo, M. Nagel, P.

The scale insect, Stictococcus vayssierei, is one of the major pests and constraints to cassava production in the Congo Basin. It is frequently found associated with the ground nesting ant, Anoplolepis tenella, under cassava plant. Amdro fire ant bait granules (contains 7.3 g/kg Hydramethylnon), ...

Enlace original: https://cgspace.cgiar.org/handle/10568/74445

Investigación en Agricultura
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Hanna, R. ,  Kuate, A.F. ,  Nanga, S.N. ,  Tindo, M. ,  Nagel, P. ,  [Boric acid for suppression of the ant Anoplolepis tenella and effects on an associated scale insect pest Stictococcus vayssierei in cassava fields in the Congo Basin] ,  Boric acid for suppression of the ant Anoplolepis tenella and effects on an associated scale insect pest Stictococcus vayssierei in cassava fields in the Congo Basin
Journal Article 2012-12

Autor: Onzo, A. Zannou, I. Adjibade, O.A. Broutani, S. Hanna, R.

La mosaïque africaine du manioc est une maladie redoutable qui ravage les champs de manioc en Afrique. Elle est causée par un virus dont le vecteur principal est la mouche blanche Bemisia tabaci. Un des moyens de lutte contre cette maladie passe par la lutte contre le vecteur B. tabaci, réputé tr...

Enlace original: https://cgspace.cgiar.org/handle/10568/77408

Investigación en Agricultura
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Onzo, A. ,  Zannou, I. ,  Adjibade, O.A. ,  Broutani, S. ,  Hanna, R. ,  [Potentialites de lacarien predateur Amblyseius swirskii (AthiasHenriot) (Acari: Phytoseiidae) dans la lutte biologique contre la mouche blanche Bemisia tabaci (Genn.), vecteur de la mosaique du manioc en Afrique] ,  Potentialites de lacarien predateur Amblyseius swirskii (AthiasHenriot) (Acari: Phytoseiidae) dans la lutte biologique contre la mouche blanche Bemisia tabaci (Genn.), vecteur de la mosaique du manioc en Afrique

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