Investigating biological control agents for controlling invasive populations of the Mealybug Pseudococcus comstocki in France

Malausa Thibault, Delaunay Mathilde, Fleisch Alexandre, Groussier-Bout Géraldine, Warot-Fricaux Sylvie, Crochard Didier, Guerrieri Emilio, Delvare Gérard, Pellizzari Giuseppina, Kaydan M. Bora, Al-Khateeb Nadia, Germain Jean-François, Brancaccio Lisa, Le Goff Isabelle, Bessac Melissa, Ris Nicolas, Kreiter Philippe. 2016. Investigating biological control agents for controlling invasive populations of the Mealybug Pseudococcus comstocki in France. PloS One, 11 (6):e0157965, 15 p.

https://doi.org/10.1371/journal.pone.0157965

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Quartile : Q1, Sujet : MULTIDISCIPLINARY SCIENCES

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie; Staps

Résumé : Pseudococcus comstocki (Hemiptera: Pseudococcidae) is a mealybug species native to Eastern Asia and present as an invasive pest in northern Italy and southern France since the start of the century. It infests apple and pear trees, grapevines and some ornamental trees. Biocontrol programmes against this pest proved successful in central Asia and North America in the second half of the 20th century. In this study, we investigated possible biocontrol agents against P. comstocki, with the aim of developing a biocontrol programme in France. We carried out systematic DNA-barcoding at each step in the search for a specialist parasitoid. First we characterised the French target populations of P. comstocki. We then identified the parasitoids attacking P. comstocki in France. Finally, we searched for foreign mealybug populations identified a priori as P. comstocki and surveyed their hymenopteran parasitoids. Three mealybug species (P. comstocki, P. viburni and P. cryptus) were identified during the survey, together with at least 16 different parasitoid taxa. We selected candidate biological control agent populations for use against P. comstocki in France, from the species Allotropa burrelli (Hymenoptera: Platygastridae) and Acerophagus malinus (Hymenoptera: Encyrtidae). The coupling of molecular and morphological characterisation for both pests and natural enemies facilitated the programme development and the rejection of unsuitable or generalist parasitoids.

Mots-clés Agrovoc : Pseudococcus comstocki, Pseudococcus, lutte biologique, agent de lutte biologique, Encyrtidae

Mots-clés géographiques Agrovoc : France

Mots-clés complémentaires : Allotropa burrelli, Acerophagus malinus

Classification Agris : H10 - Ravageurs des plantes

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

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