leaf beetle
US /liːf ˈbiːtl/
UK /liːf ˈbiːtl/

1.
chrysomèle
any beetle of the family Chrysomelidae, typically having a rounded or oval body and often brightly colored, many species of which feed on and are pests of plants
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The garden was infested with tiny leaf beetles, damaging the hosta plants.
Le jardin était infesté de minuscules chrysomèles, endommageant les hostas.
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Some species of leaf beetle are considered agricultural pests due to their feeding habits.
Certaines espèces de chrysomèles sont considérées comme des ravageurs agricoles en raison de leurs habitudes alimentaires.