Ladybird beetles; chemical ecology; integrated pest management; trophic interactions; semiochemicals; communication; Coccinelles; écologie chimique; lutte intégrée; interactions trophiques; sémiochimiques
Abstract :
[en] This paper reviews the chemical ecology of ladybird beetles (Coleoptera: Coccinellidae) to present the role of semiochemicals involved in plant-ladybird, prey-ladybird and predator-ladybird interactions. Ladybird beetles use these compounds to locate their prey, mate, protect themselves from predation or cannibalism, find a shelter to overwinter or ensure a better survival for their offspring. Thorough studies on ladybird behaviours towards these compounds could lead to their practical implementation in integrated strategies using ladybirds to control pests, like aphids or mealybugs. [fr] Cet article présente une synthèse de l’écologie chimique des coccinelles (Coleoptera : Coccinellidae) en vue de présenter le rôle des sémiochimiques impliqués dans les relations plante-coccinelle, proie-coccinelle et prédateur-coccinelle. Les coccinelles utilisent ces composés pour localiser leurs proies, s’accoupler, se protéger de la prédation ou du cannibalisme, trouver un abri où passer l’hiver ou assurer une meilleure survie pour leur descendance. L’étude approfondie des comportements des coccinelles vis-à-vis de ces molécules pourrait aboutir à leur utilisation en lutte biologique en maximisant l’efficacité des coccinelles dans le contrôle des ravageurs, comme les pucerons ou les cochenilles.
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