Hoplocampa flava L Plum sawfly

Infestation of this local species occur on damson and plum. Losses on garden and orchard trees can be considerable but attacks tend to be sporadic and unpredictable. The mainly brownish to orange-coloured adults (3.5-5.5 mm long) occur in April, and eggs are then deposited singly in the fruitlets of host plants. The creamish-white larvae feed within the fruitlets. They produce masses of wet, black frass (cf. fruitlet-mining tortrix moth, Pammene rhediella, p. 222). Fully grown larvae enter the soil and form cocoons, in which they eventually overwinter. In common with related species, there is just one generation annually.

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