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Mycopathologia

, Volume 71, Issue 1, pp 23–30 | Cite as

Hansfordia pulvinata, mycoparasite destructeur du Cladosporium fulvum

  • M. Peresse
  • D. Le Picard
Article

Résumé

LeHansfordia pulvinata a été observé sur feuilles de tomate où sa présence est liée aux thalles duCladosporium fulvum. Il se comporte en parasite à l'égard de ce champignon phytopathogène: ses rameaux télémorphiques terminés en appressorium enserrent les hyphes et les chaînes de spores de son hôte et les tuent. Dès le contact, la croissance du mycoparasite s'accélère, il recouvre les thalles duCladosporium (lui-même freiné par les substances fongistatiques émises) et gêne la dissémination de ses propagules.

L'effet néfaste pour leC. fulvum de cette interaction ainsi que certains caractères biologiques duH. pulvinata (notamment la dissémination aisée de ses abondantes xérospores et leur aptitude à la germination en conditions difficiles, ses exigences thermiques) nous font penser que cette espèce mycoparasite pourrait être utilisée comme agent de lutte biologique contre la cladosporiose de la tomate en serre.

Mots clés

Hansfordia Cladosporium Mycoparasitisme Tomate Lutte biologique 

Abstract

Hansfordia pulvinata was observed on tomato leaves where its occurrence is related to the hyphae ofCladosporium fulvum. Its behaviour is parasitic for this phytopathogenic fungus: its telemorphic branches ended by appressoria coil around the hyphae and the chains of conidia of its host and kill them. As soon as the contact is established, the growth of the mycoparasite is faster; it covers the thallus ofCladosporium (which fungus is braked by the fungistatic emitted substances) and troubles the dissemination of its propagules.

The very unfavourable effect of that interaction forC. fulvum as well as several biological characteristics ofH. pulvinata (specially the easy dispersal of its numerous xerospores, their ability to germinate in difficult conditions and its thermic requirements) lead us to think that this mycoparasitical species could be used as a biological control agent against cladosporiosis of tomato in glass house cultures.

Key words

Hansfordia Cladosporium Mycoparasitism Tomato Biological control 

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Copyright information

© Dr. W. Junk B.V. Publishers 1980

Authors and Affiliations

  • M. Peresse
    • 1
  • D. Le Picard
    • 1
  1. 1.Faculté des Sciences et TechniquesLaboratoire de Microbiologie appliquée à l'Agriculture et aux Industries agro-alimentairesBrestFrance

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