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Goergen, Georg E.Tamò, M.Kyofa-Boamah, M.E.Bokonon-Ganta, A.H.Neuenschwander, P.[Papaya mealybug: a new invading pest in West Africa]Papaya mealybug: a new invading pest in West Africa

Different combinations of insects belonging to three trophic levels were released in large cages with hydroponie cultures of cassava in a greenhouse. The cassava mealybug (CM )' Phenacoccus manihoti Matile-Ferrero (Horn., Pseudococcidae) was applied at two initial infestation densities to cassava...


Goergen, Georg E.Neuenschwander, P.[A cage experiment with four trophic levels: cassava plant growth as influenced by cassava mealybud, Phenacoccus manihoti, its parasitoid Epidinocarsis lopezi,and the hyperparasitoids Prochiloneurus insolitus and Chartocerus hyalipennis]A cage experiment with four trophic levels: cassava plant growth as influenced by cassava mealybud, Phenacoccus manihoti, its parasitoid Epidinocarsis lopezi,and the hyperparasitoids Prochiloneurus insolitus and Chartocerus hyalipennis

The endophagous hyperparasitoid Prochiloneurus insolitus (Alam) was offered various stages of Epidinocarsis lopezi (De Santis), a primary parasitoid of the cassava mealybug (CM) Phenacoccus manihoti (Matile-Ferrero). Embryos were surrounded by a trophamnion. Larval development involved four insta...


Goergen, Georg E.Neuenschwander, P.[Biology of Prochiloneurus insolitus (Alam) (Hymenoptera, Encyrtidae), a hyperparasitoid on mealybugs (Homoptera, Pseudococcidae): immature morphology, host acceptance and host range in west Africa]Biology of Prochiloneurus insolitus (Alam) (Hymenoptera, Encyrtidae), a hyperparasitoid on mealybugs (Homoptera, Pseudococcidae): immature morphology, host acceptance and host range in west Africa

The biology and behaviour of the signiphorid Chartocerus hyaipennis (HAYAT) were studied in the laboratory on Epidinocarsis lopezi (DE SANTlS), a parasitoid of the cassava mealybug Phenacoccus manihoti MATlLE-FERRERO. Only mummified secondary hosts, i.e. mealybugs, were accepted for ovi-position....


Goergen, Georg E.Neuenschwander, P.[Chartocerus hyalipennis (Hayat) (Hym: Signiphoridae), a gregarious hyperparasitoid on mealybugs (Hom.: pseudococcidae): biology and host range in west Africa]Chartocerus hyalipennis (Hayat) (Hym: Signiphoridae), a gregarious hyperparasitoid on mealybugs (Hom.: pseudococcidae): biology and host range in west Africa

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