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Journal Article 2019-07

Autor: Ngowi, B.V. Tonnang, Henri E.Z. Khamis, F. Mwangi, E.M. Nyambo, B. Ndegwa, P.N. Subramanian, S.

Monthly field surveys of diamondback moth (DBM), Plutella xylostella (L.) and its parasitoids were conducted to assess seasonal abundance and diversity under changing altitude. Twenty-four crucifer farms spread across three altitudinal zones of Mount Kilimanjaro and Taita hills were sampled for t...

Enlace original: https://cgspace.cgiar.org/handle/10568/102432

Investigación en Agricultura
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Ngowi, B.V. ,  Tonnang, Henri E.Z. ,  Khamis, F. ,  Mwangi, E.M. ,  Nyambo, B. ,  Ndegwa, P.N. ,  Subramanian, S. ,  [Seasonal abundance of Plutella xylostella (Lepidoptera: Plutellidae) and diversity of its parasitoids along altitudinal gradients of the eastern Afromontane] ,  Seasonal abundance of Plutella xylostella (Lepidoptera: Plutellidae) and diversity of its parasitoids along altitudinal gradients of the eastern Afromontane
Journal Article 2019-02-19

Autor: Adnan, A.A. Diels, J. Jibrin, J.M. Kamara, A. Craufurd, Peter Q. Shaibu, A.S. Mohammed, B. Tonnang, Henri E.Z.

Most crop simulation models require the use of Genotype Specific Parameters (GSPs) which provide the Genotype component of G×E×M interactions. Estimation of GSPs is the most difficult aspect of most modelling exercises because it requires expensive and time-consuming field experiments. GSPs could...

Enlace original: https://cgspace.cgiar.org/handle/10568/101339

Investigación en Agricultura
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Adnan, A.A. ,  Diels, J. ,  Jibrin, J.M. ,  Kamara, A. ,  Craufurd, Peter Q. ,  Shaibu, A.S. ,  Mohammed, B. ,  Tonnang, Henri E.Z. ,  [Options for calibrating ceres-maize genotype specific parameters under data-scarce environments] ,  Options for calibrating ceres-maize genotype specific parameters under data-scarce environments
Journal Article 2018

Autor: Mansour, R. Brévault, T. Chailleux, A. Cherif, A. Grissa-Lebdi, K. Haddi, K. Mohamed, S.A. Nofemela, R.S. Oke, A. Sylla, S. Tonnang, Henri E.Z. Zappalà, L. Kenis, M. Desneux, N. Biondi, A.

The South American tomato pinworm, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), is a devastating invasive pest of tomato crops in several areas around the world including Africa. Here, we comprehensively review and discuss the relevant scientific knowledge on its occurrence, biological and...

Enlace original: https://cgspace.cgiar.org/handle/10568/101454

Investigación en Agricultura
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Mansour, R. ,  Brévault, T. ,  Chailleux, A. ,  Cherif, A. ,  Grissa-Lebdi, K. ,  Haddi, K. ,  Mohamed, S.A. ,  Nofemela, R.S. ,  Oke, A. ,  Sylla, S. ,  Tonnang, Henri E.Z. ,  Zappalà, L. ,  Kenis, M. ,  Desneux, N. ,  Biondi, A. ,  [Occurrence, biology, natural enemies and management of Tuta absoluta in Africa] ,  Occurrence, biology, natural enemies and management of Tuta absoluta in Africa
Journal Article 2018

Autor: Tonnang, Henri E.Z. Makumbi, Dan Craufurd, Peter Q.

Background The phenological development of the maize crop from emergence through flowering to maturity, usually expressed as a rate (i.e. 1/duration), is largely controlled by temperature in the tropics. Maize plant phenological responses vary between varieties and quantifying these responses can...

Enlace original: https://cgspace.cgiar.org/handle/10568/101455

Investigación en Agricultura
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Tonnang, Henri E.Z. ,  Makumbi, Dan ,  Craufurd, Peter Q. ,  [Methodological approach for predicting and mapping the phenological adaptation of tropical maize (Zea mays L.) using multi‑environment trials] ,  Methodological approach for predicting and mapping the phenological adaptation of tropical maize (Zea mays L.) using multi‑environment trials
Journal Article 2019

Autor: Kiniry, J.R. Kim, S. Tonnang, Henri E.Z.

With the recent resurgence in interest in models describing maize (Zea mays L.) development rate responses to temperature, this study uses published data to refit the Poikilotherm equation and compare it to broken stick “heat stress” equations. These data were for the development rate of eight op...

Enlace original: https://cgspace.cgiar.org/handle/10568/103753

Investigación en Agricultura
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Kiniry, J.R. ,  Kim, S. ,  Tonnang, Henri E.Z. ,  [Back to the future: revisiting the application of an enzyme kinetic equation to maize development nearly four decades later] ,  Back to the future: revisiting the application of an enzyme kinetic equation to maize development nearly four decades later
Journal Article 2014

Autor: Khadioli, N. Tonnang, Henri E.Z. Ong'amo, G. Achia, Thomas Kipchirchir, I. Kroschel, J. Le Ru, B.
Enlace original: https://cgspace.cgiar.org/handle/10568/64925

Investigación en Agricultura
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Khadioli, N. ,  Tonnang, Henri E.Z. ,  Ong'amo, G. ,  Achia, Thomas ,  Kipchirchir, I. ,  Kroschel, J. ,  Le Ru, B. ,  [Effect of temperature on the life history parameters of noctuid lepidopteran stem borers, Busseola fusca and Sesamia calamistis.] ,  Effect of temperature on the life history parameters of noctuid lepidopteran stem borers, Busseola fusca and Sesamia calamistis.
Journal Article 2014

Autor: Tonnang, Henri E.Z. Tchouassi, D. Juarez, H. Igweta, L. Djouaka, R.F.

Background: Predicting anopheles vectors’ population densities and boundary shifts is crucial in preparing formalaria risks and unanticipated outbreaks. Although shifts in the distribution and boundaries of the major malariavectors (Anopheles gambiae s.s. and An. arabiensis) across Africa have be...

Enlace original: https://cgspace.cgiar.org/handle/10568/75945

Investigación en Agricultura
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Tonnang, Henri E.Z. ,  Tchouassi, D. ,  Juarez, H. ,  Igweta, L. ,  Djouaka, R.F. ,  [Zoom in at African country level: potential climate induced changes in areas of suitability for survival of malaria vectors] ,  Zoom in at African country level: potential climate induced changes in areas of suitability for survival of malaria vectors
Journal Article 2019-05-31

Autor: Djouda, B.S. Moukam Kakmeni, F.M. Guemkam Ghomsi, P. Ndjomatchoua, F.T. Tchawoua, C. Tonnang, Henri E.Z.

This paper presents the study of the dynamics of intrahost (insect pests)-pathogen [entomopathogenic fungi (EPF)] interactions. The interaction between the resources from the insect pest and the mycelia of EPF is represented by the Holling and Powell type II functional responses. Because the EPF’...

Enlace original: https://cgspace.cgiar.org/handle/10568/102127

Investigación en Agricultura
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Djouda, B.S. ,  Moukam Kakmeni, F.M. ,  Guemkam Ghomsi, P. ,  Ndjomatchoua, F.T. ,  Tchawoua, C. ,  Tonnang, Henri E.Z. ,  [Theoretical analysis of spatial nonhomogeneous patterns of entomopathogenic fungi growth on insect pest] ,  Theoretical analysis of spatial nonhomogeneous patterns of entomopathogenic fungi growth on insect pest
Journal Article 2013-03

Autor: Kroschel, J. Sporleder, M. Tonnang, Henri E.Z. Juarez, H. Carhuapoma, P. González, J.C. Simon, R.

Originating from the Andean region and co-evolved with its food plant, the potato (Solanum sp.), the potato tuber moth Phthorimaea operculella (Zeller) has become an invasive potato pest globally. The hypothesis of our present study was that the future distribution and abundance (damage potential...

Enlace original: https://cgspace.cgiar.org/handle/10568/41979

Investigación en Agricultura
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Kroschel, J. ,  Sporleder, M. ,  Tonnang, Henri E.Z. ,  Juarez, H. ,  Carhuapoma, P. ,  González, J.C. ,  Simon, R. ,  [Predicting climate-change-caused changes in global temperature on potato tuber moth Phthorimaea operculella (Zeller) distribution and abundance using phenology modeling and GIS mapping] ,  Predicting climate-change-caused changes in global temperature on potato tuber moth Phthorimaea operculella (Zeller) distribution and abundance using phenology modeling and GIS mapping
Journal Article 2013-03-15

Autor: Garrett, K.A. Dobson, A.D.M. Kroschel, J. Natarajan B Orlandini S Tonnang, Henri E.Z. Valdivia, C.

If climate change scenarios include higher variance in weather variables, this can have important effects on pest and disease risk beyond changes in mean weather conditions. We developed a theoretical model of yield loss to diseases and pests as a function of weather, and used this model to evalu...

Enlace original: https://cgspace.cgiar.org/handle/10568/33377

Investigación en Agricultura
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Garrett, K.A. ,  Dobson, A.D.M. ,  Kroschel, J. ,  Natarajan B ,  Orlandini S ,  Tonnang, Henri E.Z. ,  Valdivia, C. ,  [The effects of climate variability and the color of weather time series on agricultural diseases and pests, and on decisions for their management] ,  The effects of climate variability and the color of weather time series on agricultural diseases and pests, and on decisions for their management

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