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Book 1992

Autor: Umeh, E.D.N. Ukwungwu, M.N. Joshi, R.

La eecidomyie afrieaine des galles du riz (Orseolia oryzivora Hllrris & Gagne) est un insecte ravageur du riz dont la population a recemment eonnu une veritable explosion dans bon nombre de pays Afriellins, L'infestation peut provoquer la perte totale de la reeolte. Plusieurs agents naturels de l...

Enlace original: https://cgspace.cgiar.org/handle/10568/98750

Investigación en Agricultura
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Umeh, E.D.N. ,  Ukwungwu, M.N. ,  Joshi, R. ,  [Lutte biologique naturelle contre la cecidomyie africaine du riz au Nigeria: guide de recherche de lIita, No. 37] ,  Lutte biologique naturelle contre la cecidomyie africaine du riz au Nigeria: guide de recherche de lIita, No. 37
Book 1991

Autor: Okocha, P. Ukwungwu, M.N. Joshi, R.

La cecidomyie africaine des galles du riz est un insecte ravageur du riz dont la population a recem¬ment connu une veritable explosion dans bon nombre de pays africain s. L'infestation peut provoquer la perte totale de la recolte. Les traitements insecticides pre-sentent de nombreux inconvenients...

Enlace original: https://cgspace.cgiar.org/handle/10568/98761

Investigación en Agricultura
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Okocha, P. ,  Ukwungwu, M.N. ,  Joshi, R. ,  [Criblage au champ pour la resistance a la cecidomyie africaine du riz: guide de recherche de lIita, No. 34] ,  Criblage au champ pour la resistance a la cecidomyie africaine du riz: guide de recherche de lIita, No. 34
Journal Article 1992

Autor: Ukwungwu, M.N. Joshi, R.C.

The African rice gall midge, Orseolia oryzivora Harris and Gagné has become one of the major biotic constraints to rice production in Nigeria. A survey of gall midge distribution in Nigeria showed that the pest was common in the savannah and forest zones on rice grown under lowland ecologies. End...

Enlace original: https://cgspace.cgiar.org/handle/10568/100035

Investigación en Agricultura
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Ukwungwu, M.N. ,  Joshi, R.C. ,  [Distribution of the African rice gall midge, Orseolia oryzivora Harris and Gagne and its parasitoids in Nigeria] ,  Distribution of the African rice gall midge, Orseolia oryzivora Harris and Gagne and its parasitoids in Nigeria
Journal Article 1992

Autor: Umeh, E.D.N. Joshi, R.C. Ukwungwu, M.N.

Rice insect pest management in Nigeria is compartmentalized; literature documenting the status of research on the biology and significance of insect pests and on their management, has therefore been reviewed. A holistic, broadly based, multidisciplinary pest-management research approach is sugges...

Enlace original: https://cgspace.cgiar.org/handle/10568/100049

Investigación en Agricultura
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Umeh, E.D.N. ,  Joshi, R.C. ,  Ukwungwu, M.N. ,  [Biology, status and management of rice insect pest in Nigeria] ,  Biology, status and management of rice insect pest in Nigeria
Book 1991

Autor: Umeh, E.D.N. Joshi, R. Ukwungwu, M.N.

The African rice gall midge (ARGM), Orseolia oryzivora Harris & Gagne, has recently emerged as an important insect pest of rice in many African countries. Infestation can result in total crop failure. Naturally occurring biological control agents have been identified in Nigeria that can reduce AR...

Enlace original: https://cgspace.cgiar.org/handle/10568/98763

Investigación en Agricultura
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Umeh, E.D.N. ,  Joshi, R. ,  Ukwungwu, M.N. ,  [Natural biological control of African rice gall midge in Nigeria: IITA research guide, No. 37] ,  Natural biological control of African rice gall midge in Nigeria: IITA research guide, No. 37
Journal Article 1991

Autor: Joshi, R.C. Winslow, M.D. Ukwungwu, M.N.
Enlace original: https://cgspace.cgiar.org/handle/10568/101762

Investigación en Agricultura
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Joshi, R.C. ,  Winslow, M.D. ,  Ukwungwu, M.N. ,  [Comparison of standard evaluation system and Onates method in assessing stalkeyed fly resistance] ,  Comparison of standard evaluation system and Onates method in assessing stalkeyed fly resistance
Book 1993

Autor: Umeh, E.D.N. Joshi, R. Ukwungwu, M.N.

Les inseeles nuisibles sont une contrainle principale II la production du riz en Afrique et dans d'autres parties du monde. lis occasionnent toujours des pertes de rendement de rordre de 30 II 100'*. Les mesures de lutle comprennent les methodes culturales el biologiques, la resistance de la plan...

Enlace original: https://cgspace.cgiar.org/handle/10568/97284

Investigación en Agricultura
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Umeh, E.D.N. ,  Joshi, R. ,  Ukwungwu, M.N. ,  [Les insectes nuisibles du riz au champ en Afrique: biologie et methode de lutte] ,  Les insectes nuisibles du riz au champ en Afrique: biologie et methode de lutte
Book 1995

Autor: Umeh, E.D.N. Joshi, R.C. Ukwungwu, M.N.

Insect pests are a major constraint in rice production in Africa and elsewhere. They perennially result in crop loss which may range from 30-100 %. Measures of control include cultural and biological control, host plant resistance, and chemical methods. Chemical control has several disadvantages....

Enlace original: https://cgspace.cgiar.org/handle/10568/97239

Investigación en Agricultura
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Umeh, E.D.N. ,  Joshi, R.C. ,  Ukwungwu, M.N. ,  [Field insect pests of rice in Africa; biology and control] ,  Field insect pests of rice in Africa; biology and control

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