L'entomophthoraleNeozygites fumosa pathogène de la Cochenille du manioc,Phenacoccus manihoti [Hom.: Pseudococcidae], en République populaire du Congo

  title={L'entomophthoraleNeozygites fumosa pathog{\`e}ne de la Cochenille du manioc,Phenacoccus manihoti [Hom.: Pseudococcidae], en R{\'e}publique populaire du Congo},
  author={Bruno Le R{\"u} and Pierre Silvie and B. Papierok},
RésuméUniquement connue du sud des Etats-Unis d'Amérique, l'EntomophthoraleNeozygites fumosa (Speare) Remaudière & Keller a été retrouvée en République populaire du Congo, où elle attaque la Cochenille du manioc,Phenacoccus manihoti Matile-Ferrero [Hom.: Coccoidea Pseudococcidae]. De légères variations d'ordre biométrique sont mises en évidence au sein de l'espèce fongique. A ce jour, parmi les Entomophthorales mentionnées dans la littérature comme pathogènes de Cochenilles, seules deux espèces… 

Étude de l'évolution d'une mycose aNeozygites fumosa [Zygomycetes, Entomophthorales] dans une population de la cochenille du manioc,Phenacoccus manihoti [Hom.: Pseudococcidae]

The regulatory action of the entomophthoraceous fungus Neozygites fumosa (Speare) Remaudière & Keller (Zygomycetes) is shown for the first time in a population of the Cassava mealybug in the People's Republic of the Congo in 1982.

Nouvelles données sur le déroulement de la mycose àNeozygites fumosa sur la cochenille du maniocPhenacoccus manihoti

Results obtained in the Congo in 1987 are given on previously unstudied aspects of the epizootiology of Neozygites fumosa (Speare) Remaudière et Keller (Entomophthorales), a pathogen of the cassava mealybug, Phenacoccus manihoti Matile-Ferrero (Hom.: Pseudococcidae).

Ecology and Molecular Characterization of Neozygites tanajoae (Entomophthorales: Neozygitaceae) a fungal pathogen of the cassava green mite

Molecular techniques are the most suitable methods to detect infection of CGM by N. tanajoae and the most effective predatory mite T. aripo as both biocontrol agents are well adapted to the prevailing environmental conditions.

Specificity of a strain ofNeozygites sp. (Zygomycetes: Entomophthorales) toMononychellus tanajoa (Acari: Tetranychidae)

Results indicated the development of germination tubes of Neozygites in some females ofTetranychus bastosi Tuttle et al. were infected byNeozygites sp.

Molecular detection and differentiation of Brazilian and African isolates of the entomopathogen Neozygites tanajoae (Entomophthorales: Neozygitaceae) with PCR using specific primers

It is confirmed that the two primer pairs tested are suitable for the detection and differential identification of N. tanajoae isolates from Brazil and Africa and that they are useful to monitor the establishment and spread of the Brazilian isolates ofN.


The cassava mealybug and cassava green mite, which evidently avoid this chemical defense, soon caused direct losses of about 80 and 60%, respectively, depending on the physiological state of the plants, which i s influenced by the environment and other pests and diseases.

Emerging pests and diseases of South-east Asian cassava: a comprehensive evaluation of geographic priorities, management options and research needs.

Although all main pests and diseases are non-natives, it is hypothesise that accelerating intensification of cropping systems, increased climate change and variability, and deficient crop husbandry are aggravating both organism activity and crop susceptibility.



Considérations systématiques et biologiques sur quelques espèces d'Entomophthora du groupeSphaerosperma pathogènes d'insectes [Phycomycètes:Entomophthoraceae]

The shape of the secondary conidia which are formed at the top of capillary tubes furnish the best character for discrimination in Entomophthora strains isolated from caterpillars of Tortrix viridana L, from adults of Agriotes sputator L and from various Aphid species.

Écologie comparée des entomophthoracées pathogènes de pucerons en france littorale et continentale

The role of entomophthorosis in the dynamics of aphid populations infesting natural vegetation in northern littoral France (Basse-Normandie) and in northeastern continental France (Vosges) is compared.

Fungi as biological control agents of arthropods of agricultural and medical importance

Temperature, above all relative humidity, and their interactions are the most important physical factors influencing infection of terrestrial insects by entomopathogenic fungi and these are discussed in relation to epizootiological events.