ISHS Acta Horticulturae 681: IV International Congress on Artichoke
CONTROL OF VERTICILLIUM DAHLIAE ON ARTICHOKE STUMPS USING HOT-WATER TREATMENT |
| Authors: | B. Márquez, J. Armengol, A. Vicent, R. Sales, J. García-Jiménez |
| Keywords: | Cynara scolymus, soil fungi, temperature, thermotherapy, verticillium wilt |
| DOI: | 10.17660/ActaHortic.2005.681.78 |
| Abstract:
Verticillium wilt, caused by Verticillium dahliae Kleb. is a limiting factor in artichoke (Cynara scolymus L.) production in eastern Spain. In Spain artichoke is propagated commercially mainly via stumps, this being an important way for the dissemination of the pathogen. The purpose of this research was to evaluate conditions suitable for hot-water treatment (HWT) of artichoke stumps. In a first experiment, healthy latent artichoke stumps (cv. Blanca de Tudela) were treated at 40, 43, 46, 49, 52, 55 and 58 ºC for two periods of time, 20 and 30 min. Plants died at 55 ºC and 58 ºC, and the plants treated at 52 ºC had irregular sprouting. The rest of temperatures showed normal development in comparison with controls. There were no statistical differences on yield between controls and 40, 43 and 46 ºC. Treatments of 49 and 52 ºC resulted in lower plant production. In a second experiment, healthy latent artichoke stumps were treated at 40 ºC 60 min, 42 ºC 45 min, 42 ºC 60 min, 44 ºC 30 min, 44 ºC 45 min, 44 ºC 60 min, 46 ºC 30 min, 46 ºC 45 min and 48 ºC 30 min. Stumps showed a high percentage of sprouting with adequate plant production. Additionally, infected artichoke stumps were exposed to HWT at 46 ºC 45 min. After the treatment recovery of V. dahliae from internal fragments was greatly reduced. These results support the aim of developing a HWT leading to an effective control of V. dahliae from artichoke propagating material. | |
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