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Pears ripening on the tree are damaged by wasps excavating holes into the soft, juicy flesh. The holes are initially created by hungry birds, then wasps are attracted by the juice and move in.Pears that are still on the tree display hollowed out

Wasps love feeding on soft, juicy fruit. They can break through the skins of grapes, peaches and plums, and quickly nibble out sizeable cavities, but fruit with tougher skins such as apples and pears must first be broken open by pecking birds before

, use the parasitic wasp, Metaphycus helvolus, bought by mail order as a biological control.Use an insecticide containing imidacloprid or thiacloprid in early summer when the insects are more vulnerable.a wide range of plants, house plants, greenhouse