Invasive Species Compendium

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Abstract Full Text

Investigation and inventory of potential biological control agents linked to box-tree moth in natural environment.

Abstract

The program BIOPYR (2017-2018) aimed to study the fauna associated to box tree following the arrival of an invasive pest, Cydalima perspectalis Walker (Lepidoptera: Crambidae). For this an inventory, of insects which would take the box tree moth as a prey or as a host since its introduction in France, is currently in progress. For the parasite study, C. perspectalis moths, eggs, pupae samplings are regularly collected in five French departments of the Auvergne-RhĂ´ne-Alpes region, between May to September. This program is financed by this French ARA region. All collected insects are managed by the Biocontrol Laboratory at INRA Antibes and determined by entomologists. Thus, a current situation of the "box wood" system and its reaction to the attacks of boxwood pest are obtained with a possibility of studying its dynamic over the years. Finally, an attempt is made to rear potential parasitoids to evaluate their efficacy as a biological control agent. In 2017, five kind of predators (spider, bat, tit, wasp and syrphid flies) as well as lacewings, ladybirds and heteroptera have been kept. Four hymenopterans and one diptera were investigated on pupae and caterpillars of the box tree moths. Despite C. perspectalis toxicity (because of box tree alkaloids concentration) indigenous species have parasited this new host and are able to realize their total life cycle on it.