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Recruitment of native parasitoids by the exotic pest Tuta absoluta in Southern Italy
This survey highlighted that conservation of indigenous natural enemies, also by means of habitat management techniques, should be taken seriously into account when planning integrated management strategy of the tomato borer in the Mediterranean area.
Genetic Diversity of the Invasive Gall Wasp Leptocybe invasa (Hymenoptera: Eulophidae) and of its Rickettsia Endosymbiont, and Associated Sex-Ratio Differences
Molecular analyses suggested that L. invasa is in fact a complex of two cryptic species involved in the rapid and efficient spread of the wasp, the first recovered from the Mediterranean region and South America, the latter from China.
Biology and monitoring of Dryocosmus kuriphilus on Castanea sativa in Southern Italy
Yellow traps were shown to be an effective method for assessing the emergence of cynipid adults and could potentially be used to time chemical applications in those cases in which this control method is feasible.
Native parasitoids associated with Dryocosmus kuriphilus in Tuscany, Italy
A higher overall parasitism rate was found on wild chestnut galls (with respect to cultivated ones) and where oak trees were more abundant and where the exotic parasitoid Torymus sinensis Kamijo was more abundant.
Characterization, distribution, biology and impact on Italian walnut orchards of the invasive North-American leafminer Coptodisca lucifluella (Lepidoptera: Heliozelidae).
- U. Bernardo, E. J. van Nieukerken, R. Sasso, M. Gebiola, L. Gualtieri, G. Viggiani
- BiologyBulletin of entomological research
- 1 April 2015
The leafminer Coptodisca sp. (Lepidoptera: Heliozelidae), recently recorded for the first time in Europe on Italian black and common walnut trees, is shown to be the North-American Coptodisca…
Rickettsia Symbionts Cause Parthenogenetic Reproduction in the Parasitoid Wasp Pnigalio soemius (Hymenoptera: Eulophidae)
- M. Giorgini, U. Bernardo, M. M. Monti, A. Nappo, M. Gebiola
- BiologyApplied and Environmental Microbiology
- 19 February 2010
Evidence is provided that a Rickettsia symbiont causes thelytokous parthenogenesis in a parasitoid wasp, Pnigalio soemius (Hymenoptera: Eulophidae), and a possible route for evolution of induction of parthenogenic in the two distantly related RickettsIA lineages is discussed.
Effects of environmental parameters on the chestnut gall wasp and its complex of indigenous parasitoids
Results showed an increase in the rate of parasitism both when the host population density was lower and in unmanaged chestnut stands with more natural conditions, and the timing of attack by parasitoids followed a species-specific successional sequence throughout the larva-to-adult life cycle of the CGW.
Effects of cold storage on Thripobius javae (=T. semiluteus) (Hymenoptera: Eulophidae)
Efficient storage of this biological control agent could improve its current production and use of Thripobius javae and avoid detrimental effects on parasitoid fitness.
When exotic biocontrol agents travel without passport: First record of Quadrastichus mendeli, parasitoid of the blue-gum chalcid Leptocybe invasa, in Italy
This work genetically characterized the larval parasitoid, confirmed its placement within the genus Quadrastichus by phylogenetic analysis, and evaluated the percentage of parasitisation at three localities.
Life inside a gall: closeness does not favour horizontal transmission of Rickettsia between a gall wasp and its parasitoid.
- L. Gualtieri, F. Nugnes, A. Nappo, M. Gebiola, U. Bernardo
- BiologyFEMS Microbiology Ecology
- 1 July 2017
This study studies a system that meets ideal requirements for horizontal transmission: the gall wasp Leptocybe invasa and its parasitoid Quadrastichus mendeli, and provides indirect evidence that Rickettsia infecting Q. mendeli may be inducing thelytokous parthenogenesis.