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Migrating anthocorids are attracted by odours from psylla-infested trees in a pear orchard: evidence of induced indirect defence in the field






Bulletin OILB/SROP 17(2): 76-80

Migrating anthocorids are attracted by odours from psylla-infested trees in a pear orchard: evidence of induced indirect defence in the field

The role of odours from pear trees infested by pear psylla in attracting migrating anthocorids was studied in the field in the Netherlands. More anthocorids were found around caged trees with induced outbreaks of C. pyricola than around caged and uncaged uninfested trees. When volatilization of the odours was interrupted by covering a tree with plastic, there was an immediate drop in predator density. Removal of cages resulted in an increase in predator density on infested trees.

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Accession: 002433272



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