Natural populations of Macrolophus caliginosus and Dicyphus tamaninii in the control of the greenhouse whitefly in tomato crops
2000
Castane, C. ((Institut de Recerca i Tecnologia Agroalimentaries, Cabrils (Espagne). Centre de Cabrils, Departament de Proteccio Vegetal)) | Alomar, O. | Goula, M. | Gabarra, R.
Biological control of greenhouse whitefly by inoculative release of Encarsia formosa in spring tomato greenhouses is hampered by occasional immigrations of whitefly populations from outdoors. At the same time Dicyphus tamaninii and Macrolophus caliginosus, which are abundant polyphagous predators in the area, colonise these greenhouses where E. formosa is released. The role of these predators in the control of greenhouse whitefly was evaluated in 14 greenhouses at the end of the cropping season. They preyed on parasitized and unparasitized pupae according to their density in the crop. In the laboratory they consumed more greenhouse whitefly than E. formosa pupae when these were offered in the same proportion. Their effect on the regulation of greenhouse whitefly populations is complementary to that of E. formosa and contributes to the control of this pest in the Mediterranean area
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