Asynchronous Populations of Phytoseiulus-persimilis Athias-henriot and Effective Control of Tetranychus-urticae Koch On Tomatoes Under Glass
(1993) Journal of Horticultural Science — Vol. 68, n° 4, p. 581-588 (1993)
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- Abstract
- A stable equilibrium between the predatory mite Phytoseiulus persimilis and the spider mite Tetranychus urticae in a tomato crop was attributed to asynchronous development of local populations of the predatory mites. This was achieved by introducing predatory mites into one half of the glasshouse at the beginning of the pest infestation period, while at the same time spraying acaricides in the other half. Thus, initial populations of both species of mites, and their subsequent development, were spatially different. Predator dispersal was responsible for maintaining the system and only 3,300 predators per 100 m2, combined with three acaricidal treatments applied to half the plants were necessary to protect the crop for a 30 week period. The system having been established, the mean number of spider mites per damaged leaflet was only 31 and the highest number of spider mite individuals per attacked leaflet was 160. In the last 14 weeks of the crop only 13% of the leaflets on the upper ten leaves showed feeding marks.
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Nihoul, P. (1993). Asynchronous Populations of Phytoseiulus-persimilis Athias-henriot and Effective Control of Tetranychus-urticae Koch On Tomatoes Under Glass. Journal of Horticultural Science, 68(4), 581-588. https://hdl.handle.net/2078.5/87475 (Original work published 1993)