ISHS Acta Horticulturae 422: International Conference on Integrated Fruit Production
BIOLOGICAL CONTROL OF TWO-SPOTTED SPIDER MITE TETRANYCHUS URTICAE ON STRAWBERRIES BY THE PREDATORY PHYTOSEIID MITE TYPHLODROMUS PYRI. |
| Authors: | M. Zacharda, M. Hluchý |
| Abstract:
The predatory phytoseiid mite Typhlodromus pyri Scheuten, a strain, “Mikulov” from the south Moravian commercial vineyards, was released on strawberries infested with the two-spotted spider mite, Tetranychus urticae Koch, and grown under glass. The initial average number of spider mites was 9.68 active stages per 1 trifoliate leaf when the predator was introduced to every plant in the beginning of April. The initial predator : prey ratio was approximately 1 : 10, respectively. No pesticides were used subsequently. The predator gave good control of spider mites till fruiting in mid-May and henceforth despite frequent low air humidity and water deprivation of plants in a dry glasshouse. | |
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