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Journal Article 1994

Autor: Dreyer, H. Baumgaertner, J.U. Tamo, M.

Three insect groups, known from the literature, were confirmed to make up a seed pest complex in cowpea fields in Benin Republic (West Africa). Several species of heteropteran pod‐sucking bugs (PSBs), two lepidopteran species, namely Maruca testulalis (Geyer) and Cydia ptyehora (Meyrick) and the ...

Enlace original: https://cgspace.cgiar.org/handle/10568/100933

Investigación en Agricultura
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Dreyer, H. ,  Baumgaertner, J.U. ,  Tamo, M. ,  [Seed damaging field pests of cowpea (Vigna unguiculata) L.Walp.) in Benin: occurance and pest status] ,  Seed damaging field pests of cowpea (Vigna unguiculata) L.Walp.) in Benin: occurance and pest status
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

Investigación en Agricultura
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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 1988

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

( 1 ) A model for the growth and development of cassava, Manihot esculenta Crantz, as modified by weather, soil nitrogen and water is described, and used in later papers to evaluate damage by exotic cassava pests and the effectiveness of control by natural. (2) Analogous relationships between t...

Enlace original: https://cgspace.cgiar.org/handle/10568/96339

Investigación en Agricultura
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Gutiérrez, A.P. ,  Wermelinger, B. ,  Schulthess, F. ,  Baumgaertner, J.U. ,  Herren, H.R. ,  Ellis, C.K. ,  Yaninek, John S. ,  [Analysis of biological control of cassava pests in Africa: I. Simulation of carbon, nitrogen and water dynamics in cassava] ,  Analysis of biological control of cassava pests in Africa: I. Simulation of carbon, nitrogen and water dynamics in cassava
Journal Article 1999

Autor: Bonato, O. Schulthess, F. Baumgaertner, J.U.

A population model for maize growth and development driven by temperature, solar radiation, soil water and soil nitrogen is presented. A time-varying distributed delay model is used to describe the dynamics of the attributes number, biomass and nitrogen belonging to leaf, root, stem, grain, rachy...

Enlace original: https://cgspace.cgiar.org/handle/10568/98046

Investigación en Agricultura
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Bonato, O. ,  Schulthess, F. ,  Baumgaertner, J.U. ,  [Simulation model for maize crop growth based on acquisition and allocation processes for carbohydrate and nitrogen] ,  Simulation model for maize crop growth based on acquisition and allocation processes for carbohydrate and nitrogen
Journal Article 1997

Autor: Staubli Dreyer, B. Baumgaertner, J.U. Neuenschwander, P. Dorn, S.
Enlace original: https://cgspace.cgiar.org/handle/10568/103837

Investigación en Agricultura
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Staubli Dreyer, B. ,  Baumgaertner, J.U. ,  Neuenschwander, P. ,  Dorn, S. ,  [The functional responses of two Hyperaspis notat strains to their prey, the cassava mealybug Phenacoccus manihoti] ,  The functional responses of two Hyperaspis notat strains to their prey, the cassava mealybug Phenacoccus manihoti
Journal Article 1997

Autor: Staubli Dreyer, B. Neuenschwander, P. Baumgaertner, J.U. Dorn, S.

The coccinellid, Hyperaspis notata Mulsant, is associated with the mealybugs Phenacoccus manihoti Mat.‐Ferr. and P. herreni Williams, on cassava in southern Brazil and the highlands of Colombia. Brought to Africa to help control the accidentally introduced P. manihoti, its range of target prey an...

Enlace original: https://cgspace.cgiar.org/handle/10568/98698

Investigación en Agricultura
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Staubli Dreyer, B. ,  Neuenschwander, P. ,  Baumgaertner, J.U. ,  Dorn, S. ,  [Trophic influences on survival, development and reproduction of Hyperaspis notata (Col., Coccinellidae)] ,  Trophic influences on survival, development and reproduction of Hyperaspis notata (Col., Coccinellidae)
Journal Article 1993

Autor: Tamo, M. Baumgaertner, J.U. Gutiérrez, A.

The interactions between cowpea and one of its key pests, Megalurothrips sjostedti (Trybom), were evaluated via a simulation model based on three modules building the core of the cowpea growth model, i.e. the time-varying distributed delay, the functional response acquisition function, and the me...

Enlace original: https://cgspace.cgiar.org/handle/10568/98700

Investigación en Agricultura
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Tamo, M. ,  Baumgaertner, J.U. ,  Gutiérrez, A. ,  [Analysis of the cowpea agroecosystem in West Africa: II. Modelling the interactions between cowpea and the bean flower thrips Megalurothrips sjostedti (Trybom) (Thysanoptera, Thripidae)] ,  Analysis of the cowpea agroecosystem in West Africa: II. Modelling the interactions between cowpea and the bean flower thrips Megalurothrips sjostedti (Trybom) (Thysanoptera, Thripidae)
Journal Article 2002

Autor: Li Pun, H.H. Baumgaertner, J.U. Greiling, J. Gopalan, H. Jabbar, M.A. Mares, V. McDermott, John J. Odiit, M. Mohamed-Saleem, M.A.

Past attempts to alleviate the problems of poor farmers engaged in mixed-crop-livestock production have generally focussed on the design and diffusion of new technologies targeted on specific components of the agroecosystem. Unfortunately, such piece-meal efforts have had little impact in the dev...

Enlace original: https://cgspace.cgiar.org/handle/10568/29169

Investigación en Agricultura
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Li Pun, H.H. ,  Baumgaertner, J.U. ,  Greiling, J. ,  Gopalan, H. ,  Jabbar, M.A. ,  Mares, V. ,  McDermott, John J. ,  Odiit, M. ,  Mohamed-Saleem, M.A. ,  [Linking natural resources, agriculture and human health: case studies from East Africa] ,  Linking natural resources, agriculture and human health: case studies from East Africa
Journal Article 1995

Autor: Dreyer, H. Baumgaertner, J.U.

Stage-specific survival rates of cowpea seeds were evaluated in fields planted during both cropping seasons of 1991 and 1992 in southern Benin using Manly's regression model. Considerable seed damage could be recognised in all seed growth stages and reflected the variable pest infestations during...

Enlace original: https://cgspace.cgiar.org/handle/10568/101061

Investigación en Agricultura
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Dreyer, H. ,  Baumgaertner, J.U. ,  [The influence of postflowering pests on cowpea seed yield with particular reference to damage by Heteroptera in southern Benin] ,  The influence of postflowering pests on cowpea seed yield with particular reference to damage by Heteroptera in southern Benin
Journal Article 1991

Autor: Yaninek, John S. Baumgaertner, J.U. Gutiérrez, A.P.

Density-specific sampling plans were developed under African conditions for the exotic spider mite, Mononychellus tanajoa (Bondar), a serious pest of cassava, Manihot esculenta. The within-plant distribution of Mononychellus tanajoa was found to favour new foliage, regardless of time of planting ...

Enlace original: https://cgspace.cgiar.org/handle/10568/101693

Investigación en Agricultura
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Yaninek, John S. ,  Baumgaertner, J.U. ,  Gutiérrez, A.P. ,  [Sampling Mononychellus tanajoa (Acari: Tetranychidae) on cassava in Africa] ,  Sampling Mononychellus tanajoa (Acari: Tetranychidae) on cassava in Africa

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