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Journal Article 1994

Autor: Chakupurakal, J. Markham, R.H. Neuenschwander, P. Sakala, M. Malambo, C. Mulwanda, D. Banda, E. Chalabesa, A. Bird, T. Haug, T.M.

Surveys were carried out in Zambia twice yearly from 1986 to 1990, to assess the impact of a biological control campaign against the cassava mealybug (CM), Phenacoccus manihoti Mat.-Ferr., throughout the infested area. From 1984 onward, the exotic parasitoid Epidinocarsis lopezi (De Santis) (Hym....

Enlace original: https://cgspace.cgiar.org/handle/10568/100893

Investigación en Agricultura
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Chakupurakal, J. ,  Markham, R.H. ,  Neuenschwander, P. ,  Sakala, M. ,  Malambo, C. ,  Mulwanda, D. ,  Banda, E. ,  Chalabesa, A. ,  Bird, T. ,  Haug, T.M. ,  [Biological control of the cassava mealybug, Phenacoccus manihoti (Homoptera: Pseudococcidae), in Zambia] ,  Biological control of the cassava mealybug, Phenacoccus manihoti (Homoptera: Pseudococcidae), in Zambia
Journal Article 1994

Autor: Neuenschwander, P. Boavida, C. Bokonon-Ganta, A.H. Gado, A. Herren, H.R.

Two specific endophagous parasitoids Gyranusoidea tebygi and Anagyrus mangicola, of Indian origin, were mass‐reared at the International Institute of Tropical Agriculture in Cotonou and released against the mango mealybug Rastrococcus invadens, in collaboration with national biological control pr...

Enlace original: https://cgspace.cgiar.org/handle/10568/100935

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Neuenschwander, P. ,  Boavida, C. ,  Bokonon-Ganta, A.H. ,  Gado, A. ,  Herren, H.R. ,  [Establishment and spread of Gyranusoidea tebygi Noyes and Anagyrus mangicola Noyes (Hymenoptera: Encyrtidae), two biologigal control agents released against the mango mealybug Rastrococcus invadens Williams (Homoptera: Pseudococcidae) in Africa] ,  Establishment and spread of Gyranusoidea tebygi Noyes and Anagyrus mangicola Noyes (Hymenoptera: Encyrtidae), two biologigal control agents released against the mango mealybug Rastrococcus invadens Williams (Homoptera: Pseudococcidae) in Africa
Journal Article 1990

Autor: Hennessey, R.D. Neuenschwander, P. Muaka, T.

The cassava mealybug, Phenacoccus manihoti Mat.‐Ferr., spread in Zaire from foci at Kinshasa (1973), Mulandi (1978), and Goma (1982). It now occurs over an area of 560 000 km2, mainly in regions with a dry season of at least 90 days. Within these regions the pest occurs principally in areas havin...

Enlace original: https://cgspace.cgiar.org/handle/10568/101847

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Hennessey, R.D. ,  Neuenschwander, P. ,  Muaka, T. ,  [Spread and current distribution of the cassava mealybug, Phenacoccus manihoti (Homoptera: Pseudococcidae), in Zaire] ,  Spread and current distribution of the cassava mealybug, Phenacoccus manihoti (Homoptera: Pseudococcidae), in Zaire
Journal Article 1988

Autor: Gutiérrez, A.P. Neuenschwander, P. Schulthess, F. Herren, H.R. Baumgaertner, J.U. Wermelinger, B. Lohr, B. Ellis, C.K.

(1) The effects of the cassava mealybug, Phenacoccus manihoti Mat.-Ferr., on cassava, Manihot esculenta Crantz, growth, development and yields as modified by weather, soil water and nitrogen, and natural enemies were examined. (2) Rainfall-induced mortality and plant carbohydrate stress were the...

Enlace original: https://cgspace.cgiar.org/handle/10568/96338

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Gutiérrez, A.P. ,  Neuenschwander, P. ,  Schulthess, F. ,  Herren, H.R. ,  Baumgaertner, J.U. ,  Wermelinger, B. ,  Lohr, B. ,  Ellis, C.K. ,  [Analysis of the biological control of cassava pests in Africa: II. Cassava mealybug (Phenaccoccus manihoti)] ,  Analysis of the biological control of cassava pests in Africa: II. Cassava mealybug (Phenaccoccus manihoti)
Journal Article 2011

Autor: Goergen, Georg E. Tamò, M. Kyofa-Boamah, M.E. Bokonon-Ganta, A.H. Neuenschwander, P.
Enlace original: https://cgspace.cgiar.org/handle/10568/83305

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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
Journal Article 1994

Autor: Neuenschwander, P.

During the Africa-wide Biological Control project, the neotropical parasitoid Epidinocarsis lopezi (De Santis) (Hymenoptera: Encyrtidae) was established in 26 African countries, causing a satisfactory reduction in the population density of the cassava mealybug Phenacoccus manihoti Mat.-Ferr. (Hom...

Enlace original: https://cgspace.cgiar.org/handle/10568/97392

Investigación en Agricultura
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Neuenschwander, P. ,  [Control of the cassava mealybug in Africa: lessons from a biological control project] ,  Control of the cassava mealybug in Africa: lessons from a biological control project
Journal Article 1999

Autor: Gutiérrez, A.P. Yaninek, John S. Neuenschwander, P. Ellis, C.K.

The metapopulation dynamics of the African cassava food web is explored using a physiologically based tritrophic model. The interacting species are cassava, cassava mealybug and its natural enemies (two parasitoids, a coccinellid predator and a fungal pathogen), and the cassava greenmite and its ...

Enlace original: https://cgspace.cgiar.org/handle/10568/97948

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Gutiérrez, A.P. ,  Yaninek, John S. ,  Neuenschwander, P. ,  Ellis, C.K. ,  [A physiologically based tritrophic metapopulation model of the African cassava food web] ,  A physiologically based tritrophic metapopulation model of the African cassava food web
Journal Article 1993

Autor: Gutiérrez, A. Neuenschwander, P. Alphen, J. van

1. A unified ratio-dependent supply-demand driven tritrophic model of the cassava (Manihot esculenta Crantz) system was compared to field data, and then used to explore the basis for the successful control of cassava mealybug (CM, Phenacoccus manihoti Mat.-Ferr.) in Africa by the exotic parasitoi...

Enlace original: https://cgspace.cgiar.org/handle/10568/98623

Investigación en Agricultura
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Gutiérrez, A. ,  Neuenschwander, P. ,  Alphen, J. van ,  [Factors affecting biological control of cassava mealybug by exotic parasitoids: a ratio dependent supply demand driven model] ,  Factors affecting biological control of cassava mealybug by exotic parasitoids: a ratio dependent supply demand driven model
Journal Article 1990

Autor: Neuenschwander, P. Hammond, W. Ajuonu, O. Gado, A. Echendu, N. Bokonon-Ganta, A.H. Allomasso, R. Okon, I.

Population data concerning the cassava mealybug (CM) Phenacoccus manihoti Matile-Ferrero, the introduced parasitoid Epidinocarsis lopezi (De Santis), and indigenous antagonists were collected, together with ecological and plant growth variables, during a survey of 414 fields covering all ecologic...

Enlace original: https://cgspace.cgiar.org/handle/10568/98695

Investigación en Agricultura
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Neuenschwander, P. ,  Hammond, W. ,  Ajuonu, O. ,  Gado, A. ,  Echendu, N. ,  Bokonon-Ganta, A.H. ,  Allomasso, R. ,  Okon, I. ,  [Biological control of the cassava mealybug, Phenacoccus manihoti (Hom., Pseudococcidae) by Epidinocarsis lopezi (Hym., Encyrtidae) in West Africa, as influenced by climate and soil] ,  Biological control of the cassava mealybug, Phenacoccus manihoti (Hom., Pseudococcidae) by Epidinocarsis lopezi (Hym., Encyrtidae) in West Africa, as influenced by climate and soil
Journal Article 1993

Autor: Cudjoe, A. Neuenschwander, P. Copland, M.

In surveys of cassava fields in the coastal savanna and rain forest zones of Ghana, eight species of ants, mostly in the genera Camponotus, Crematogaster and Pheidole (Hymenoptera: Formicidae), were found attending cassava mealybug, Phenacoccus manihoti Matile-Ferrero. Ant densities were much hig...

Enlace original: https://cgspace.cgiar.org/handle/10568/98669

Investigación en Agricultura
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Cudjoe, A. ,  Neuenschwander, P. ,  Copland, M. ,  [Interference by ants in biological control of the cassava mealybug Phenacoccus manihoti (Hemiptera: Pseudococcidae) in Ghana] ,  Interference by ants in biological control of the cassava mealybug Phenacoccus manihoti (Hemiptera: Pseudococcidae) in Ghana

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