ISHS Acta Horticulturae 246: International Symposium on Protected Cultivation of Ornamentals in Mild Winter Climates
POSSIBILITY OF INTEGRATED PEST MANAGEMENT IN GERBERA CROPS |
| Authors: | E. Bordas, D. López, M. Maynou, E. Gutiérrez |
| DOI: | 10.17660/ActaHortic.1989.246.38 |
| Abstract:
The first objective of this work is to control the american leafminer, Liriomyza trifolii Burgess (Dipt: Agromyzidae) on gerbera cut flower culture. L. trifolii is a new species in our Region. It appeared in 1981. In 1985 it became a general pest, extending its influence to other crops. It caused panic among growers due to the resistance it showed to all pesticides commonly used. In 1986, an assay on Gerbera in an experimental greenhouse was conducted. The aim was to check for the presence of any local parasites potentially controlling this new pest. Results were highly satisfactory. Several parasites turned up. Diglyphus isaea (Walker) (Hym. Eulophidae) appeared to be the most effective at maintaining the pest under control. All along the year there was no need to apply any insecticide or acaricide treatment. In commercial greenhouses, at least one treatment is applied weekly to the crop. A second assay, in a commercial crop is been going on since the end of 1987. This one is being used to confirm the performance of D. isaea, and to elucidate how to introduce the mecanisms of integrated control to the traditional crop management techniques. Encarsia formosa Gahan (Hym. Aphelinidae) is introduced against white-fly. All other pests are controlled by monitoring indigenous natural enemies. | |
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