gypsy moth
US /ˈdʒɪp.si ˌmɑːθ/
UK /ˈdʒɪp.si ˌmɑːθ/

1.
spongieuse, bombyx disparate
a moth (Lymantria dispar) whose larvae are highly destructive to forest trees, native to Eurasia and North Africa and introduced to North America
:
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The forest was heavily infested with gypsy moth caterpillars.
La forêt était fortement infestée de chenilles de la spongieuse.
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Efforts are being made to control the spread of the gypsy moth.
Des efforts sont faits pour contrôler la propagation de la spongieuse.