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Se han encontrado 442 recursos
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...
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...
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...
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...
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...
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....
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...
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