Contarinia medicaginis Kieffer Lucerne flower midge

Infestations of this widely distributed midge occur on lucerne. The whitish larvae (up to 2mm long) feed gregariously within the flower buds, which become swollen basally and fail to open. Heavy infestations cause significant seed loss, damage often being of considerable importance in continental Europe but of little significance in the British Isles. The yellowish-grey adults occur from May onwards, and development from egg to adult takes approximately 5-6 weeks; there are two or three generations annually.

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