ISHS Acta Horticulturae 927: XXVIII International Horticultural Congress on Science and Horticulture for People (IHC2010): International Symposium on Greenhouse 2010 and Soilless Cultivation
EVALUATION OF INTEGRATED PEST MANAGEMENT FOR ROSE AND ITS CONSEQUENCES ON FLOWER QUALITY |
| Authors: | R. Brun, C. Metay, C. Wdziekonski , M.C. Gronier |
| Keywords: | Rosa hybrid, Integrated Pest Management (IPM), flower quality, greenhouse |
| DOI: | 10.17660/ActaHortic.2012.927.27 |
| Abstract:
For greenhouse rose crop protection against pests, the number of authorized pesticides is being reduced. Pests affecting this crop in a simultaneous or successive way remain great, e.g. western flower thrips, whitefly, two-spotted spider mite, aphids, powdery mildew, grey mould. It is important to obtain flowers with an aesthetic quality level according to EU standard. We have studied this point using integrated pest management using beneficial organisms (IPM) to protect greenhouse rose crops compared with the usual chemical management using pesticides (CM). We have evaluated the efficiency of these two methods to control rose pests and the quality of the flowers obtained using these two strategies. The quality of flowers obtained using IPM was similar to that using CM, while decreasing in a considerable way the use of pesticides. By comparing the percentage of non-marketable flowers in these two situations, three main causes of loss of quality were identified: two-spotted spider mites, western flower thrips and powdery mildew attacks. IPM allows for the control of two-spotted spider mites when the pesticide use is not efficient. Even if IPM is more environmentally friendly, the balance remains more difficult to control all the pests and to obtain satisfactory quality. It may be necessary to define new rose flower quality standards which encourage the use of the IPM rather than maintain the strict standards, basically aesthetic, which resort to the use of pesticides, and so contribute to the well-being of workers in greenhouses and in fine consumers. | |
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