Journal of Insect Science (2003) 3 (33), p. 10 (Guerrieri et al.)

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Emilio Guerrieri, Maria Cristina Digilio, Giandomenico Corrado, Francesco Pennacchio and Rosa Rao (2003)
Flight response of Aphidius ervi to tomato plant volatiles
Journal of Insect Science 3 (33), 10-10
XIII International Entomophagous Insects Workshop - July 27-31, 2003, Tucson, Arizona, U.S.A.
Abstract: Plants can be attractive towards natural enemies of insects that attack them. This common feature is termed indirect resistance and can be exploited to increase biological control of insect pests. The attractiveness of two tomato ecotypes towards Aphidius ervi has been studied in wind tunnel bioassay. This parasitoid has proved to be the most effective biocontrol agent of Macrosiphum euphorbiae, the key pest of tomato grown in open field in Southern Italy. It has been found that a high level of attractiveness can be either constitutive (ecotype AN5), i.e. recorded in absence of infestation by M. euphorbiae, or induced (ecotype AN7), i.e. produced after several days of aphid infestation. In AN5, aphid infestation did not enhance attractiveness towards A. ervi, probably due to its higher level of direct resistance to aphids. The F1 obtained by crossing AN5xAN7 followed the response recorded for AN7, suggesting that the inducibility of high level of attractiveness is inherited according to dominant fashion. As a consequence, it appears that this character may be introgressed efficiently into commercially valuable varieties of tomato.
Database assignments for author(s): Emilio Guerrieri, Rosa Rao

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Macrosiphum euphorbiae Tomato (Solanum lycopersicum) Italy
Aphidius ervi (parasitoid) Macrosiphum euphorbiae Tomato (Solanum lycopersicum) Italy