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The efficiency of natural enemies, especially the exotic parasitoid Epidinocarsis lopezi (De Santis) and the indigenous predator Exochomus troberti Mulsant, in reducing populations of the cassava mealybug (CM), Phenacoccus manihoti Mat.‐Ferr., was studied through exclusion experiments. In the phy...


Cudjoe, A.R.Neuenschwander, P.Copland, M.J.W.[Experimental determination of the efficiency of indigenous and exotic natural enemies of the cassava mealybug, Phenacoccus manihoti Mat. Ferr. (Hom., Pseudococcidae), in Ghana]Experimental determination of the efficiency of indigenous and exotic natural enemies of the cassava mealybug, Phenacoccus manihoti Mat. Ferr. (Hom., Pseudococcidae), in Ghana

During the past six years, the South-American encyrtid wasp Epidinocarsis lopezi (De Santis) was released from the ground and from the air in about 100 areas in Africa for the biological control of the cassava mealybug (CM) Phenacoccus manihoti Mat.-Ferr. It was established in all release sites a...


Neuenschwander, P.Haug, T.Ajounu, O.Davis, H.Akinwumi, B.Madojemu, E.[Quality requirements in natural enemies used for inoculative release: practical experience from a successful biological control programme]Quality requirements in natural enemies used for inoculative release: practical experience from a successful biological control programme

The capability of Epidinocarsis lopezi (De Santis) (Hymenoptera: Encyrtidae) to control the cassava mealybug (CM) Phenacoccus manihoti Mat.-Ferr. (Homoptera: Pseudococcidae) was investigated in Nigeria using physical and chemical exclusion experiments. In two sleeve cage experiments CM population...


Neuenschwander, P.Schulthess, F.Madojemu, E.[Experimental evaluation of the efficiency of Epidinocarsis lopezi, a parasitoid introduced into Africa against the cassava mealybug Phenacoccus manihoti]Experimental evaluation of the efficiency of Epidinocarsis lopezi, a parasitoid introduced into Africa against the cassava mealybug Phenacoccus manihoti

Cassava mealybugs (CM) of different stages, which had been stung by an E. lopezi female, were inspected after 6 and 20 days. The killing power of the parasitoid was several times higher than the production of parasitoid off-spring. Host-feeding and mutilation were responsible for 6-22% and 11-34%...


Neuenschwander, P.Madojemu, E.[Mortality of the cassava mealybug Phenacoccus manihoti Mat.-Ferr.(Hom., Pseudococcidea) associated with an attack by Epidinocarsis lopezi (Hym., Encyrtidae)]Mortality of the cassava mealybug Phenacoccus manihoti Mat.-Ferr.(Hom., Pseudococcidea) associated with an attack by Epidinocarsis lopezi (Hym., Encyrtidae)

About 130 species of parasitoids and predators are reported, most of them for the first time, to be associated directly or indirectly with the cassava pest Phenacoccus manihoti Matile-Ferrero and its parasitoid, Epidinocarsis lopezi (De Santis), newly introduced into Africa as a biological contro...


Neuenschwander, P.Hennessey, R.D.Herren, H.R.[Food web of insects associated with the cassava mealybug, Phenacoccus manihoti Matile-Ferrero (Hemiptera: Pseudococcidae), and its introduced parasitoid, Epidinocarsis lopezi (De Santis) (Hymenoptera: Encyrtidae), in Africa]Food web of insects associated with the cassava mealybug, Phenacoccus manihoti Matile-Ferrero (Hemiptera: Pseudococcidae), and its introduced parasitoid, Epidinocarsis lopezi (De Santis) (Hymenoptera: Encyrtidae), in Africa
Neuenschwander, P.Hughes, J.Ogbe, F.Ngatse, J.Legg, J.P.[Occurrence of the Uganda variant of East African cassava mosaic virus (EACMVUg) in western Democratic Republic of Congo and the Congo Republic defines the westernmost extent of the CMD pandemic in East/Central Africa]Occurrence of the Uganda variant of East African cassava mosaic virus (EACMVUg) in western Democratic Republic of Congo and the Congo Republic defines the westernmost extent of the CMD pandemic in East/Central Africa

In laboratory experiments with Epidinocarsis lopezi, a parasite that has been introduced into Africa for the biological control of Phenacoccus manihoti on cassava, hosts of different stages that had been stung by a female parasite were inspected after 6 and 20 days. The killing power of the paras...


Neuenschwander, P.Madojemu, E.[Mortality of the cassava mealybug, Phenacoccus manihoti MAT.FERR. (Hom., Pseudococcidae), associated with an attack by Epidinocarsis lopezi (Hym., Encyrtidae)]Mortality of the cassava mealybug, Phenacoccus manihoti MAT.FERR. (Hom., Pseudococcidae), associated with an attack by Epidinocarsis lopezi (Hym., Encyrtidae)

Since 1999, four specific weevils (Coleoptera, Curculionidae) were released in the Republic of Congo against three exotic floating water weeds: Neochetina eichhorniae Warner and N. bruchi Hustache against water hyacinth, Neohydronomus affinis Hustache against water lettuce, and Cyrtobagous salvin...


Mbati, G.Neuenschwander, P.[Biological control of three floating water weeds, Eichhornia crassipes, Pistia stratiotes, and Salvinia molesta in the Republic of Congo]Biological control of three floating water weeds, Eichhornia crassipes, Pistia stratiotes, and Salvinia molesta in the Republic of Congo

The management schemes of four rain forest patches in southern Benin and south-western Nigeria, which led to the successful protection of numerous threatened plants and animals over the last 20 plus years, are analysed. Since climatic conditions are similar, tree composition depends largely on di...


Neuenschwander, P.Bown, D.Hedegbetan, G.C.Adomou, A.[Long-term conservation and rehabilitation of threatened rain forest patches under different human population pressures in West Africa]Long-term conservation and rehabilitation of threatened rain forest patches under different human population pressures in West Africa

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