Détail de la référence

Études histologiques et ultrastructurales des larves de Pandemis heparana (Lep. Tortricidae) au cours des stades avancés d'une baculovirose due à un nouveau virus inducteur de diapause

Auteurs : Amargier (Augusta), Abol-Ela (Saïd), Croizier (Guy), Martouret (Daniel), Meynadier (Gérard) et Vergara (S.)


Année de publication : 1981
Publication : Entomophaga
Volume : 26
Fascicule : 3
Pagination : 319-332


Résumé :

A nuclear polyhedrosis virus infecting the tortricid P. heparana Denis & Schiffermuller collected in an apple orchard in France was isolated and studied. The baculovirus is active only in newly hatched larvae. It induces a delayed arrest of development in L3 larvae and subsequently the death of L5 and L6 larvae. Study by light microscopy and EM of L5 and L6 larvae exhibiting very marked symptoms of the viral disease (early stages of paralysis and whitish abdominal segment color) shows that the site of virus multiplication is mainly located in the fat body cells and occasionally in some hemocytes or hypoderm cells. Virus morphogenesis within the fat body cells is described. Some aspects of the ultrastructure such as clubbed virions, crystallization process of polyhedral bodies and clumps of fibrous material induced by the virus are discussed