The role of Macrolophus caliginosus (Heteroptera: Miridae) in controlling the two-spotted mite in greenhouse tomato under North-European conditions | [Le rôle de Macrolophus caliginosus (Heteroptera: Miridae) dans la lutte contre le tétranyque tisserand chez la tomate sous serre dans les conditions nord-européennes]
1999
Koskula, H. ((Agricultural Centre of Finland, Jokioinen (Finland). Plant Production)) | Vaenninen, I. | Lindqvist, I.
In a study conducted in 13 commercial tomato greenhouses in Finland, Macrolophus caliginosus was used in combination with Phytoseiulus persimilis to study the potential contribution of the bugs to the control of spider mites (Tetranychus urticae) in tomato. The bugs (1.2-1.6 per m2) were applied in one, two or three batches in February-March 1997. Predator and pest numbers were recorded from leaf samples every two weeks starting in April and ending in September. In the end, there were hardly any spider mites left in the ten greenhouses where the two predator species were used in combination. In the three greenhouses where P. persimilis was used alone, the predatory mites suppressed the pest population to a low level by July, too, after which pest numbers re-increased until in September the plants were heavily infested again. The numbers of M. caliginosus began to increase notably only from the end of May onwards. The application of Ephestia kuehniella eggs in February-April, to feed the predators after their release, could not be shown to be connected with increased predator or decreased pest numbers in May-September
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Este registro bibliográfico ha sido proporcionado por Centre de coopération internationale en recherche agronomique pour le développement