MALAUSA , Jean-Claude

National audience

Le Psylle du Gommier rouge (Glycaspis brimblecombei Moore, 1964) a été signalé de France en 2012. Dans le cadre de la recherche des moyens de lutte biologique contre ce ravageur des eucalyptus, la découverte simultanée de son parasitoïde Psyllaephagus bliteus Riek, 1962, a été effectuée dans le département des Alpes-Maritimes. Le ravageur et...

Cinq espèces de Psylles ont envahi les plantations d'eucalyptus européens : Ctenarytaina eucalypti, C. spatulata, C. peregrina, Blastopsylla occidentalis et Glycaspis brimblecombei. C. eucalypti, C. spatulata et C. peregrina étaient les seules présentes en France à ce jour. La découverte de G. brimblecombei en France continentale et en Corse...

Cinq espèces de Psylles ont envahi les plantations d'eucalyptus européens : Ctenarytaina eucalypti, C. spatulata, C. peregrina, Blastopsylla occidentalis et Glycaspis brimblecombei. C. eucalypti, C. spatulata et C. peregrina étaient les seules présentes en France à ce jour. La découverte de G. brimblecombei en France continentale et en Corse...

One frequent explanation for the failure of biological invasions is the Allee effect: due to positive density dependence, initially small invading populations may fail to establish and spread. Populations released for biological control are similar to fortuitous invading populations and may therefore suffer from Allee effects. However, unlike...

Considered as a major pest of Castanea species worldwide, the chestnut gall wasp Dryocosmus kuriphilus Yasumatsu (Hymenoptera, Cynipidae) can induce fruit production losses of 60-80%. Reported for the first time in Italy in 2002, this pest is now widespread across the French distribution of chestnut trees.Based on successful attempts in other...

Context : Considered as one of the most important pest of Castanea species worldwide, the chestnut gall wasp Dryocosmus kuriphilus (Hymenoptera,Cynipidae) can induced fruit production losses from 60 to 80% (EFSA, 2010). Reported for the first time in Europe in 2002 in Italy (Brussino et al., 2002), this pest was detected in France in 2007 and...

We report here for the first time the presence of Ophelimus mediterraneus sp. n. in Mediterranean Europe. This species appears to be closely related to Ophelimus maskelli, a well-known invasive pest of Eucalyptus. Based on molecular (cytochrome oxidase I, 28S), morphological (multivariate ratio analysis) and bio-ecological investigations, our...

The olive fruit fly, Bactrocera oleae (Dipt., Tephritidae), is the most important pest of olive crops in the world. Economic losses associated to the limited efficiency of pesticides and natural regulation require the development of new alternatives. A classical biological control program was thus implemented in 2007 in France with two main...