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Onzo, A.Sabelis, M.W.Hanna, R.[Single versus multiple enemies and the impact on biological control of spider mites in cassava fields in WestAfrica]Single versus multiple enemies and the impact on biological control of spider mites in cassava fields in WestAfrica

The introduction of Typhlodromalus limonicus (Garman & McGregor) sensu lato is a major component of an on-going biological control campaign against the exotic cassava pest Mononychellus tanajoa (Bondar) in Africa. However, long-term establishment of this exotic phytoseiid predator has not yet bee...


Rogg, H.W.Yaninek, John S.[Population dynamics of Typhlodromalus limonicus from Colombia, an introduced predator of the exotic cassava green mite in West Africa]Population dynamics of Typhlodromalus limonicus from Colombia, an introduced predator of the exotic cassava green mite in West Africa

Three field trials were conducted at IITA, Ibadan, Nigeria between 1993 and 1995 to identify a rapid method of screening cassava (Manihot esculenta Crantz) cultivars for canopy retention and to determine the association between canopy retention and resistance to green spider mite (Mononychellus t...


Nukenine, E.N.Dixon, Alfred G.O.Hassan, A.T.Asiwe, J.A.N.[Evaluation of cassava cultivars for canopy retention and its relationship with field resistance to green spider mite]Evaluation of cassava cultivars for canopy retention and its relationship with field resistance to green spider mite

The issue of introducing single or multiple natural enemy species for classical biological control has been an area of intense inquiry by ecologists and biological control practitioners. This is particularly relevant to classical biological control of cassava green mite Mononychellus tanajoa (Bon...


Onzo, A.Hanna, R.Janssen, A.Sabelis, M.[Interactions between two neotropical phytoseiid predators and consequences for biological control of a shared prey]Interactions between two neotropical phytoseiid predators and consequences for biological control of a shared prey

In tropical dry seasons, survival of small arthropods such as predatory mites is often negatively affected by low relative humidity (RH). For species that do not diapause or migrate to refuges, the ability of the habitat to mitigate climatic conditions becomes crucial. ...


Zundel, C.Nagel, P.Hanna, R.Korner, F.Scheidegger, Urs C.[Environment and hostplant genotype effects on the seasonal dynamics of a predatory mite on cassava in subhumid tropical Africa]Environment and hostplant genotype effects on the seasonal dynamics of a predatory mite on cassava in subhumid tropical Africa

The survival of Neozygites cf. floridana (Weiser and Muma) as dry hyphal bodies in mummified cassava green mites, Mononychellus tanajoa (Bondar), at 5.0% RH in the dark was affected by storage temperature. Survival of the fungus in mummies kept at 24 + 1.0°C could be demonstrated for 6-7 months. ...


Oduor, G.Yaninek, John S.Geest, L. van derMoraes , G.J. de[Survival of Neozygites cf. floridana (Zygomycetes: entomophthorales) in mummified cassava green mites and the viability of its primary conidia]Survival of Neozygites cf. floridana (Zygomycetes: entomophthorales) in mummified cassava green mites and the viability of its primary conidia

A survey of the distribution and abundance of cassava green mite and associated indigenous natural enemies found in the cassava agroecosystem in Cameroon was conducted during the 1991 dry season (January-February). The survey area included nine of the ten provinces of the country and covered 4.2 ...


Tchuanyo, M.Yaninek, John S.Hammond, W.Onzo, A.Lienou, L.[Countrywide distribution of fauna association with the cassva green mite (Mononychellus tanajoa) in Cameroon]Countrywide distribution of fauna association with the cassva green mite (Mononychellus tanajoa) in Cameroon

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

How the pathogen inoculum size affects the pathogenicity of Neozygites floridanatoMononychellus tanajoawas studied at 28°C, 12L:12D photoperiod and 90–100% RH. All inoculum sizes tested (one, two, four, six, and eight capilliconidia per mite) were lethal. Dead mites started to appear 48 hr after ...


Oduor, G.I.Yaninek, John S.Moraes , G.J. deGeest, L.P.S. van der[The effect of pathogen dosage on the pathogenicity of Neozygites floridana (Zygomycetes:Entomophthorales) to Mononychellus tanajoa (Acari: Tetranychidae)]The effect of pathogen dosage on the pathogenicity of Neozygites floridana (Zygomycetes:Entomophthorales) to Mononychellus tanajoa (Acari: Tetranychidae)

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