Biological control factors influencing populations of oak leaf-miner,Lithocolletis messaniellaZeller, in New Zealand including the introduction of parasites

摘要

The oak leaf-miner, a European species, was first recorded in New Zealand in February 1951. Populations of this insect in New Zealand suffer heavy mortality at certain times due to adverse food-plant leaf conditions.Apanteles circumscriptusNees andEnaysma splendensDelucchi were selected from the European parasite complex for consignment to New Zealand andApantelesmaterial was sent during March and April andEnaysmaduring October 1957. During the summer of 1957-58 Apanteles reached high population levels in Nelson.