Contarinia dactylidis Loew Cocksfoot midge

Infestations of this univoltine species occur on cocksfoot. The small (up to 2mm long), gregari ous, lemon-yellow larvae (cf. Contarinia geniculati, below) feed on the seeds, sheltered within the glumes. Adult midges are active from late May onwards, eggs being deposited within the developing florets. The larvae feed during the summer for up to 4 weeks. Fully grown individuals then enter the soil to overwinter, each in a silken cocoon. Pupation takes place in the spring, shortly before the appearance of the adults. Although seed production is reduced, attacks are rarely of economic importance.

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