Surveys were conducted in Brazil, Benin and Tanzania to collect predatory mites as candidates for control of the coconut mite Aceria guerreronis Keifer, a serious pest of coconut fruits. At all locations surveyed, one of the most dominant predators on infested coconut fruits was identified as Neo...
Sourassou, N.F.
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Hanna, R.
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Zannou, I.
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Breeuwer, J.A.
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Moraes, G. de
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Sabelis, M.
,
[Morphological, molecular and crossbreeding analysis of geographic populations of coconutmite associated predatory mites identified as Neoseiulus baraki: evidence for cryptic species?]
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Morphological, molecular and crossbreeding analysis of geographic populations of coconutmite associated predatory mites identified as Neoseiulus baraki: evidence for cryptic species?
Neoseiulus neobaraki and N. paspalivorus are amongst the most common phytoseiid predators of coconut mite, Aceria guerreronis, found in the spatial niche beneath coconut fruit bracts. Both predators may occur on the same coconut palms in Benin and Tanzania and are therefore likely to interact wit...
Negloh, K.
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Hanna, R.
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Schausberger, P.
,
[Intraguild predation and cannibalism between the predatory mites Neoseiulus neobaraki and N. paspalivorus, natural enemies of the coconut mite Aceria guerreronis]
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Intraguild predation and cannibalism between the predatory mites Neoseiulus neobaraki and N. paspalivorus, natural enemies of the coconut mite Aceria guerreronis
Cocoa mirids, Sahlbergella singularis and Distantiella theobroma, are the most economically important insect pests of cocoa in West and Central Africa, where they can cause up to 40% losses in cocoa yields. Sahlbergella singularis is the most common species in Cameroon and was therefore targeted ...
Mahot, H.C.
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Mahob, J.R.
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Hall, D.R.
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Arnold, S.E.J.
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Fotso, A.K.
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Membang, G.
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Ewane, N.
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Kemga, A.
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Fiaboe, K.K.M.
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Bilong, C.F.B
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Hanna, R.
,
[Visual cues from different trap colours affect catches of Sahlbergella singularis (Hemiptera: Miridae) in sex pheromone traps in Cameroon cocoa plantations]
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Visual cues from different trap colours affect catches of Sahlbergella singularis (Hemiptera: Miridae) in sex pheromone traps in Cameroon cocoa plantations
It is well known that plant-inhabiting predators use herbivore-induced plant volatiles to locate herbivores being their prey. Much less known, however, is the phenomenon that genotypes of the same host plant species vary in the attractiveness of these induced chemical signals, whereas they also d...
Fotso, A.K.
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Hanna, R.
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Tindo, M.
,
Nagel, P.
,
[Transport and dispersal of Stictococcus vayssierei (Hemiptera, stictococcidae) by Anoplolepis tenella (Hymenoptera, formicidae)]
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Transport and dispersal of Stictococcus vayssierei (Hemiptera, stictococcidae) by Anoplolepis tenella (Hymenoptera, formicidae)
Hanna, R.
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Agnontcheme, D.
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Gnanvossou, D.
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Goergen, Georg E.
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Agbaka, A.
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[Inventaire et importance des degats des mouches des fruits sur quelques varietes d’agrumes au Benin]
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Inventaire et importance des degats des mouches des fruits sur quelques varietes d’agrumes au Benin
Climate change has major impacts on the food security and livelihoods of smallholder farmers in Africa south of the Sahara. Vulnerable to the vagaries of weather and to being chronically poor, women farmers are unequally and more negatively affected by climate change and seasonal changes than mal...
Nkengla-Asi, L.
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Babu, S.C.
,
Kirscht, H.
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Apfelbacher, S.
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Hanna, R.
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Tegbaru, A.
,
[Gender, climate change, and resilient food systems: lessons from strategic adaptation by smallholder farmers in Cameroon]
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Gender, climate change, and resilient food systems: lessons from strategic adaptation by smallholder farmers in Cameroon
Genotype by environment interaction remains a substantial issue in all breeding programs. Crop genotypes are generally developed in a central breeding location, but always require the evaluation of breeding products in different environments. This is particularly relevant in countries that have a...
Hanna, R.
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Kulakow, P.
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Parkes, E.
,
Iluebbey, P.
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Ngome, F.A.
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Suh, C.
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Massussi, J.
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Choutnji, I.
,
Wirnkar, V.L.
,
[AMMI analysis of cassava response to contrasting environments: case study of genotype by environment effect on pests and diseases, root yield, and carotenoids content in Cameroon]
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AMMI analysis of cassava response to contrasting environments: case study of genotype by environment effect on pests and diseases, root yield, and carotenoids content in Cameroon
With increasing concerns raised by climate change, understanding biological processes within cocoa (Theobroma cacao L.) agroforest (CAF) and fallow systems is a prerequisite for developing actions related to emission reduction in the shifting agricultural landscape of Cameroon. Carbon (C) stocks ...
Silatsa, F.B.
,
Yemefack, M.
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Ewane-Nonga, N.
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Kemga, A.
,
Hanna, R.
,
[Modeling carbon stocks dynamics under fallow and cocoa agroforest systems in the shifting agricultural landscape of central Cameroon]
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Modeling carbon stocks dynamics under fallow and cocoa agroforest systems in the shifting agricultural landscape of central Cameroon
Entomopathogenic fungi are among biocontrol agents being considered for the control of aphids on a variety of crops. Predatory coccinellids, although generalist, are also among important natural enemies that must be conserved for aphid management. Laboratory studies were carried out to investigat...
Bayissa, W.
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Ekesi, S.
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Mohamed, S.
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Kaaya, G.P.
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Wagacha, M.
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Hanna, R.
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Maniania, N.K.
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[Interactions among vegetable-infesting aphids, the fungal pathogen Metarhizium anisopliae (Ascomycota: Hypocreales) and the predatory coccinellid Cheilomenes lunata (Coleoptera: Coccinellidae)]
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Interactions among vegetable-infesting aphids, the fungal pathogen Metarhizium anisopliae (Ascomycota: Hypocreales) and the predatory coccinellid Cheilomenes lunata (Coleoptera: Coccinellidae)