Introduction and successful establishment in New Zealand of further strains ofApanteles ruficrusHaliday (Hymenoptera:Braconidae) to combatPseudaletia (Mythimna) separata(Walk.) (Lepidoptera:Noctuidae)

摘要

The introduction from Pakistan of new strains ofApanteles ruficrushas produced a spectacular decrease in the field incidence ofPseudaletia separatain New Zealand. The rearing and release programme is described, and the benefits to maize growing and grazing in northern areas are discussed.