Typhlodromallus aripo, a predatory phytoseiid species of the cassava green mite Mononychellus tanajoa was introduced to the Democratic Republic of Congo in 1998. It established easily and spread quickly to other areas from the sites of first release. But its dispersal was constrained by intense c...
Tata-Hangy, K.
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Hanna, R.
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Toko, M.
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Solo, M.
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[Effect of cassava leaf harvesting on a cassava green mite predator in the Democratic Republic of Congo]
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Effect of cassava leaf harvesting on a cassava green mite predator in the Democratic Republic of Congo
To improve biocontrol of the cassava green mite, Mononychellus tanajoa, a series of screenhouse experiments were conducted on cassava to determine the effects of single and combined releases of the predatory mite Typhlodromalus aripo and the entomopathogenic fungus Neozygites tanajoae on the supp...
Onzo, A.
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Bello, I.
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Hanna, R.
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[Effects of the entomopathogenic fungus Neozygites tanajoae and the predatory mite Typhlodromalus aripo on cassava green mite densities: screenhouse experiments]
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Effects of the entomopathogenic fungus Neozygites tanajoae and the predatory mite Typhlodromalus aripo on cassava green mite densities: screenhouse experiments
To assess farmers’ perception and criteria for cassava variety preference prior to the dissemination of improved varieties in Cameroon, field visits were organized at the Mbalmayo research farm of International Institute of Tropical Agriculture (IITA ) during the vegetative and harvest periods, a...
Njukwe, E.
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Hanna, R.
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Kirscht, H.
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Araki, S.
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[Farmers perception and criteria for cassava variety preference in Cameroon]
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Farmers perception and criteria for cassava variety preference in Cameroon
Okra germplasm collected from different locations around the world were screened atAVRDC(TheWorldVegetable Center) in 2011 and 2012 to identify germplasm resistant to themelon aphid (Aphis gossypii) for use in sub-Saharan Africa. A total of 260 okra accessions andvarieties were screened (150 at A...
In order to understand product flows of cassava and actors along its value chain, a study was conducted in three out of the five antennas of National Program for Roots and Tuber Development (PNDRT); South and Centre, West and North West and East regions in Cameroon with the aid of structured ques...
Njukwe, E.
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Hanna, R.
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Sarr, S.
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Shigeru, A.
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Kirscht, H.
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Mbairanodji, A.
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Ngue-Bissa, T.
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Tenkouano, A.
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[Cassava value chain development through partnership and stakeholders platform in Cameroon]
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Cassava value chain development through partnership and stakeholders platform in Cameroon
There is an increasing awareness that vegetation diversity can affect herbi-vore and natural enemy abundance and that plants can play a major rolein directly manipulating natural enemy abundance for protection againstherbivore attacks. Using data from cassava fields, we aimed at (i) testingthe ca...
Onzo, A.
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Hanna, R.
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Toko, M.
,
[Mixplanting pubescent and glabrous cassava affects abundance of Typhlodromalus aripo and its prey mite Mononychellus tanajoa]
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Mixplanting pubescent and glabrous cassava affects abundance of Typhlodromalus aripo and its prey mite Mononychellus tanajoa
The whitefy Bemisia tabaci, a species complex consisting of many morphologically indistinguishable species divided into distinct clades, is one of the most globally important agricultural pests and plant virus vectors. Cassava-colonizing B. tabaci transmits viruses that cause cassava mosaic disea...
Chen, W.
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Wosula, Everlyne N.
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Hasegawa, D.K.
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Casinga, C.
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Shirima, R.R.
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Fiaboe, K.K.M.
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Hanna, R.
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Fosto, A.
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Goergen, Georg E.
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Tamò, M.
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Mahuku, George S.
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Murithi, H.M.
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Tripathi, L.
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Mware, B.
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Kumar, P.L.
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Ntawuruhunga, Pheneas
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Moyo, C.
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Yomeni, M.
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Boahen, S.
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Edet, M.
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Awoyale, W.
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Wintermantel, William M.
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Ling, K.S.
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Legg, J.P.
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Fei, Z.
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[Genome of the African cassava whitefly Bemisia tabaci and distribution and genetic diversity of cassava-colonizing whiteflies in Africa]
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Genome of the African cassava whitefly Bemisia tabaci and distribution and genetic diversity of cassava-colonizing whiteflies in Africa
Fopius arisanus (Sonan) (Hymenoptera: Braconidae) is a koinobiont solitary parasitoid of various fruit flies, particularly those in the genus Bactrocera. Researchers introduced F. arisanus into Africa for the biological control of Bactrocera dorsalis (Hendel) (Diptera: Tephritidae), a pest of a w...
Nanga, S.N.
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Hanna, R.
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Gnanvossou, D.
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Fotso Kuate, A.
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Fiaboe, K.K.M.
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Djieto-Lordon, C.
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[Fruit preference, parasitism, and offspring fitness of Fopius arisanus (Hymenoptera: Braconidae) exposed to Bactrocera dorsalis' (Diptera: Tephritidae) infested fruit species]
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Fruit preference, parasitism, and offspring fitness of Fopius arisanus (Hymenoptera: Braconidae) exposed to Bactrocera dorsalis' (Diptera: Tephritidae) infested fruit species
This study uses the social relations framework to explore gender norms and relations surrounding banana production and banana bunchy top disease (BBTD) containment in six pilot communities in Cameroon and Nigeria. The objective of the study is to understand how gender norms and relations shape an...
Nkengla-Asi, L.
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Olaosebikan, O.D.
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Che, V.S.
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Ngatat, S.
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Zandjanakou-Tachin, M.
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Hanna, R.
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Kumar, P.L.
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[Gender norms and their implications for banana production and recovery in west Africa]
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Gender norms and their implications for banana production and recovery in west Africa
Interspecific predation and cannibalism are common types of interaction in phytoseiid predator guilds, but the extent and nature of these interactions have not been determined yet in phytoseiid guilds composed of African native and neotropical exotic phytoseiid predators found in cassava habitat ...
Zannou, I.D.
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Hanna, R.
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Moraes , G.J. de
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Kreiter, S.
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[Cannibalism and interspecific predation in a phytoseiid predator guild from cassava fields in Africa: evidence from the laboratory]
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Cannibalism and interspecific predation in a phytoseiid predator guild from cassava fields in Africa: evidence from the laboratory