Flower cluster damage by leafcurling midge larvae

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 Early season damage by leafcurling midge can cause distortion of flower clusters (flowers and leaves), sometimes leading to fruit distortion. Leafcurling midge adults normally lay their eggs on and among the very young unfolding leaves at the tips of the terminal shoots and other actively-growing shoots. The hatching larvae cause shoot distortion by rolling the edges of the young leaves. The rolls remain on the leaves as they mature. Leafcurling midge larvae and pupae can infect the calyx of fruit at harvest, where they spin cocoons.

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