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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...


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

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...


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

The need to evaluate non-target effects of classical biological control of arthropod pests has received considerable attention in recent years. We determined with repeated field surveys the changes in abundance and distribution of the phytoseiid mite fauna in cassava fields resulting from the int...


Zannou, I.D.Hanna, R.Agboton, B.Moraes, G.J. deKreiter, S.Phiri, G.Jone, A.[Native phytoseiid mites as indicators of non-target eVects of the introduction of Typhlodromalus aripo for the biological control of cassava green mite in Africa]Native phytoseiid mites as indicators of non-target eVects of the introduction of Typhlodromalus aripo for the biological control of cassava green mite in Africa

La production du mals, I'une des eerolalea lei plus cultivees dans Ie monde, est serieusement mena-cole par les insectes nuisibles. Lea pertea annuelles ae chiffrent en millions de dollars. Le. molthodes de lutte culturale, chimique et biologique viennent compltlter la rolsistance varietale. La p...


Bosque Pérez, N.A.[Principaux insectes nuisibles du mais en Afrique; biologie et methodes de lutte: guide de recherche de lIita, No. 30]Principaux insectes nuisibles du mais en Afrique; biologie et methodes de lutte: guide de recherche de lIita, No. 30

The establishment of the neotropical predatory mite Typhlodromalus aripo in sub-Saharan Africa has resulted in broadly successful biological control of the cassava green mite Mononychellus tanajoa throughout the cassava belt of Africa. In some mid-altitude areas and drier lowland savannahs of sub...


Zundel, C.Hanna, R.Scheidegger, Urs C.Nagel, P.[Living at the threshold: where does the neotropical phytoseiid mite Typhlodromalus aripo survive the dry season?]Living at the threshold: where does the neotropical phytoseiid mite Typhlodromalus aripo survive the dry season?

We conducted two main surveys during dry seasons of 2008 and 2009 in 29 sites within the five pilot zones of the “Programme National de Développement des Racines et Tubercules” (PNDRT)-Cameroon to assess potential changes triggered by the introduction of improved varieties on cassava pest status....


Tindo, M.Njukwe, E.Mbairanodji, A.Tenkouano, A.[Situation actuelle des ravageurs du manioc et les méthodes de lutte au Cameroun.][Current pest status of cassava and their management strategies in Cameroon]Current pest status of cassava and their management strategies in Cameroon

In this study, we investigate the spatio-temporal fluctuations of the cashew leafminer Eteoryctis gemoniella Stainton, which was recently reported as one of the most devastating cashew pests in Benin. Eteoryctis gemoniella causes serious damage, especially to the young tender leaves, thus reducin...


Agboton, C.Onzo, A.Akohou, H.A.Goergen, Georg E.Vidal, S.Tamò, M.[Population dynamics of the cashew leafminer, Eteoryctis gemoniella (Lepidoptera: Gracillariidae), and inventory of its parasitoids in cashew orchards of Northern Benin, West Africa]Population dynamics of the cashew leafminer, Eteoryctis gemoniella (Lepidoptera: Gracillariidae), and inventory of its parasitoids in cashew orchards of Northern Benin, West Africa

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