Journal of Economic Entomology (1997) 90, 370-382

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Deann C. Glenn and Ary A. Hoffmann (1997)
Developing a commercially viable system for biological control of light brown apple moth (Lepidoptera: Tortricidae) in grapes using endemic Trichogramma (Hymenoptera: Trichogrammatidae)
Journal of Economic Entomology 90 (2), 370-382
Abstract: A native species of Trichogramma, Trichogramma (Trichogrammanza) carverae (Oatrnan and Pinto), has potential as a commercially viable control option for an Australian tortricid leafroller Epiphyes postvittana (Walker) in wine grapes. Four candidate species of Trichogramma were collected from E. postvittana egg masses in vineyards and assessed in the laboratory for their suitability for commercial use. This led to the isolation of a strain of T. carverae for putative commercial release. Inundative release trials using small blocks within commercial vineyards showed that >75% of the egg masses in the vineyard could be parasitized by T. carverae at release rates of 70,000 Trichogramma per hectare with as few as 30 release sites per hectare. Parasitism was higher around release sites within the first 2 d but was fairly evenly distributed over, the 0.05-ha release blocks in the 4-5 d trials. The wasps moved upwind when there was little to no wind and downwind when wind speeds were higher (usually >5 km/h). Monitoring systems for E. postvittana were developed to help determine effective timing of releases. This study illustrates a relatively quick and inexpensive approach to the development of new strains of Trichogramma for commercial use that could be adapted for other agricultural systems.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Ary A. Hoffmann

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Epiphyas postvittana Grapevine (Vitis)
Trichogramma carverae (parasitoid) Epiphyas postvittana Grapevine (Vitis)
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