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Journal Article 2002

Autor: Ngoko, Z. Cardwell, K. Marasas, W.F.O. Wingfield, M. Ndemah, R. Schulthess, F.

The aim was to identify biological and physical factors responsible for reducing maize yield in Cameroon. Two surveys were conducted in 137 fields in two agroecological zones in 1995–1997. In the Humid Forest (HF), Bipolaris maydis, Stenocarpella macrospora, Puccinia polysora, Rhizoctonia solani ...

Enlace original: https://cgspace.cgiar.org/handle/10568/92747

Investigación en Agricultura
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Ngoko, Z. ,  Cardwell, K. ,  Marasas, W.F.O. ,  Wingfield, M. ,  Ndemah, R. ,  Schulthess, F. ,  [Biological and physical contraints on maize production in the Humid Forest and Western Highlands of Cameroon] ,  Biological and physical contraints on maize production in the Humid Forest and Western Highlands of Cameroon
Journal Article 1994

Autor: Shanower, T.G. Schulthess, F. Bosque Pérez, N.A.

Sesamia calamistis Hampson and Eldana saccharina Walker larvae were reared at 25°C on pieces of stem from five indigenous African grasses. All five, Andropogon sp., Panicum maximum Jacq., Pennisetum polystachion (L.) Schult., P. purpureum L. and Sorghum arundinaceum (Desv.) Stapf. have been repor...

Enlace original: https://cgspace.cgiar.org/handle/10568/100913

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Shanower, T.G. ,  Schulthess, F. ,  Bosque Pérez, N.A. ,  [The effect of laval diet on the growth and development of Sesamia calamistis Hampson (Lepidoptera: Noctuidae) and Eldana saccharina Walker (Lepidoptera: PYralidae)] ,  The effect of laval diet on the growth and development of Sesamia calamistis Hampson (Lepidoptera: Noctuidae) and Eldana saccharina Walker (Lepidoptera: PYralidae)
Journal Article 2001

Autor: Ndemah, R. Poehling, H. Borgemeister, C. Schulthess, F.

common lepidopterous borers attacking maize and/or the wild host Penni.l'etum purpureum in the forest zonc of Camcroon arc the noctuids Buss('ola.li/sca (Fuller), Sesamia calamistis (Hampson) and Poeol1oma serrata (Hampson), the pyralids Eldani! s{{cc/wrin{{ (Walker) and Mus.l'idia nigrivel1ella ...

Enlace original: https://cgspace.cgiar.org/handle/10568/103669

Investigación en Agricultura
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Ndemah, R. ,  Poehling, H. ,  Borgemeister, C. ,  Schulthess, F. ,  [Spatial dynamics of lepidopterous pests on Zea mays (Linnaeus) and Pennisetum purpureum (Moench) in the forest zone of Cameroon and their implications for sampling schemes] ,  Spatial dynamics of lepidopterous pests on Zea mays (Linnaeus) and Pennisetum purpureum (Moench) in the forest zone of Cameroon and their implications for sampling schemes
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 2009

Autor: Hailemichael, Y. Schulthess, F. Smith, Jimmy W. Overholt, W.A.

Three gregarious, endoparasitic braconids, a Kenyan strain of Cotesia sesamiae, and the exotic Cotesia flavipes and Cotesia chilonis were imported into Benin as candidates for biological control of stem- and cob borers of maize and stemborers of millet. Host acceptability and host suitability of ...

Enlace original: https://cgspace.cgiar.org/handle/10568/90875

Investigación en Agricultura
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Hailemichael, Y. ,  Schulthess, F. ,  Smith, Jimmy W. ,  Overholt, W.A. ,  [Physiological suitability of six West African gramineous borers (Lepidoptera: Noctuidae, Pyralidae) for development of Cotesia species complex (Hymenoptera: Braconidae)] ,  Physiological suitability of six West African gramineous borers (Lepidoptera: Noctuidae, Pyralidae) for development of Cotesia species complex (Hymenoptera: Braconidae)
Journal Article 2001-06

Autor: Ndemah, R. Schulthess, F. Poehling, M. Borgemeister, C. Goergen, Georg E.

The importance, geographical and temporal distributions of parasitoids of lepidopterous borers on maize and elephant grass, Pennisetum purpureum, were assessed during surveys in farmers’ fields in six villages and two on-station trials in the forest zone of Cameroon between 1995 and 1996. The bor...

Enlace original: https://cgspace.cgiar.org/handle/10568/96579

Investigación en Agricultura
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Ndemah, R. ,  Schulthess, F. ,  Poehling, M. ,  Borgemeister, C. ,  Goergen, Georg E. ,  [Natural enemies of lepidopterous borers on maize and elephant grass in the forest zone of Cameroon] ,  Natural enemies of lepidopterous borers on maize and elephant grass in the forest zone of Cameroon
Journal Article 1999

Autor: Cherry, A.J. Lomer, C.J. Djegui, D.A. Schulthess, F.

A review of the existing basis for maize stem borer IPM is given and the role of pathogens in the system is evaluated. Survey work outlining the major groups of insect pathogens is described; fungi (Beauveria bassiana and Metarhizium anisopliae), bacteria (Bacillus thuringiensis and Serratia marc...

Enlace original: https://cgspace.cgiar.org/handle/10568/98050

Investigación en Agricultura
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Cherry, A.J. ,  Lomer, C.J. ,  Djegui, D.A. ,  Schulthess, F. ,  [Pathogen incidence and their potential as microbial control agents in IPM of maize stem borers in West Africa] ,  Pathogen incidence and their potential as microbial control agents in IPM of maize stem borers in West Africa
Journal Article 1999

Autor: Sétamou, M. Schulthess, F. Bosque Pérez, N.A. Poehling, H.M. Borgemeister, C.

Life table studies of Mussidia nigrivenella Ragonot, a pest of maize in Benin, showed that host plant species had a significant effect on larval survival and developmental time. The maximum percentage of larvae surviving was recorded on jackbean, Canavalia ensiformis (36%) and lowest on maize (18...

Enlace original: https://cgspace.cgiar.org/handle/10568/98058

Investigación en Agricultura
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Sétamou, M. ,  Schulthess, F. ,  Bosque Pérez, N.A. ,  Poehling, H.M. ,  Borgemeister, C. ,  [Bionomics of Mussidia nigrivenella (Lepidoptera: Pyralidae) on three host plants] ,  Bionomics of Mussidia nigrivenella (Lepidoptera: Pyralidae) on three host plants
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

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