Developing a commercially viable system for biological control of light brown apple moth (Lepidoptera: Tortricidae) in grapes using endemic Trichogramma (Hymenoptera: Trichogrammatidae)

摘要: A native species of Trichogramma, Trichogramma (Trichogrammanza) carverae (Oatman & Pinto), has potential as a commercially viable control option for an Australian tortricid leafroller Epiphyas postvittana (Walker) in wine grapes. Four candidate were collected from E. egg masses vineyards and assessed the laboratory their suitability commercial use. This led to isolation strain T putative release. Inundative release trials using small blocks within showed that >75% vineyard could be parasitized by T. at rates 70,000 per hectare with few 30 sites hectare. Parasitism was higher around first 2 d but fairly evenly distributed over 0.05-ha 4-5 trials. The wasps moved upwind when there little no wind downwind speeds (usually >5 km/h). Monitoring systems developed help determine effective timing releases. study illustrates relatively quick inexpensive approach development new strains use adapted other agricultural systems.