ISHS Acta Horticulturae 487: VI International Symposium on Processing Tomato & Workshop on Irrigation & Fertigation of Processing Tomato
PRESENCE AND DISTRIBUTION OF THRIPS IN PROCESSING TOMATO FIELDS OF THE VEGAS ALTAS DEL GUADIANA, EXTREMADURA (SPAIN) |
| Authors: | R. Ortiz, C. González |
| Keywords: | Sampling, Frankliniella, Thrip |
| Abstract:
The presence of thrips, a potential threat to tomato cultivation, was monitored in nurseries and fields in the Vegas Altas del Guadiana (Badajoz, Spain) during 1996 and 1997. Weekly or bi-weekly samples for the isolation. identification, and counting of thrips populations were taken from nurseries (greenhouses) and fields during the growing season. In the nurseries Thrips spp. were found to be continuously present, generally with high levels of predator Aeolothrips spp. Frankliniella spp., which are known to transmit viral diseases were rarely found. In the fields, Thrips spp. were generally also widespread. The predator Aeolothrips spp. were abundant at the beginning of the season, but declined as insecticide treatments were started. Frankliniella spp. (F. occidentalis and F. intonsa) were rarely found. except in one area where it was the most abundant species. | |
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