Dicyphus tamaninii as a beneficial insect and pest in tomato crops in Catalonia,Spain |
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| Authors: | R Gabarra C Castañé E Bordas R Albajes |
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| Institution: | (1) Centre d'Investigació Agrària de Cabrils, Institut de Recerca i Tecnologia Agroalimentàries, Catra. de Cabrils s/n, 08348 Cabrils-Barcelona, (Espanya);(2) Centre d'Investigació i Desenvolupament Agrari de Lleida, Universitat Politècnica de Catalunya-Institut de Recerca i Tecnologia Agroalimentàries, Rovira Roure 177, 25006 Lleida, (Espanya) |
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| Abstract: | The mirid bugDicyphus tamaninii Wagner, is common in Catalonia in vegetable crops which have not been sprayed with insecticide. To study the feeding habits
of this bug in tomato crops, several treated and untreated tomato plots were set up at Cabrils Experimental Station (North
of Barcelona) during 1983, 1984 and 1985.
The results indicate thatTrialeurodes vaporariorum Westwood populations are greatly affected by the mirid bug when no, or only a few, insecticide sprays are applied. However,
the bug heavily damaged tomato fruits in unsprayed plots, where bug numbers were high and whitefly numbers low. It seems that
tomato fruit is only preferred when whitefly numbers are extremely low. Similar results were obtained in 1984 in a preliminary
experiment using cages to exclude the bug.
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| Keywords: | Dicyphus tamaninii Trialeurodes vaporariorum biological control vegetable crops tomato |
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