Assessment of the effect of surface drip irrigation on Verticillium dahliae propagules differing in persistence in soil and on verticillium wilt of olive
| Autor: | Dolores Rodríguez-Jurado, J. J. Hidalgo, V. Vega, Antonio Santos-Rufo, J. C. Hidalgo |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Irrigation Plant Science Drip irrigation Horticulture Biology Verticillium biology.organism_classification 01 natural sciences Persistence (computer science) 010602 entomology Agronomy Soil water Genetics Verticillium dahliae Verticillium wilt Agronomy and Crop Science Water content 010606 plant biology & botany |
| Zdroj: | Plant Pathology. 66:1117-1127 |
| ISSN: | 0032-0862 |
| Popis: | For efficient integrated management of Verticillium wilt in olive (VWO), it is important to establish whether irrigation treatments that mitigate the disease in Verticillium dahliae-infested soil, also reduce the levels of more and less persistent propagules of the pathogen in soil when irrigation water is V. dahliae-free. Effects of irrigation on VWO and V. dahliae propagules were evaluated under natural environmental conditions. Potted plants were irrigated (pathogen-free water) to two ranges of soil water content (RWC; high and low) at three surface drip-irrigation frequencies (daily, weekly and daily during some period and otherwise weekly). VWO and total inoculum density (ID), density of less persistent micropropagules (MpD) and more persistent sclerotia (SwD) in wet soil and sclerotia density for air-dried soil (SdD) were monitored. A logistic model (multiple sigmoid) of disease incidence revealed the lowest parameter values in daily irrigated treatments. Daily frequency of irrigation showed significantly lower Disease Incidence (39.2%) and Disease Intensity Index (43.9%) and MpD (88.0%) values as areas compared with other frequencies, regardless of the RWC. High RWC significantly reduced (70.8-84.9%) ID, Swd and SdD as areas, while significantly increased (18.0%) the Incidence of Infected Plants (IIP), regardless of the irrigation frequency. The disease incidence was not correlated with the temperature. Daily irrigation to low RWC mitigated the VWO and the IIP, kept soil to the lowest MpD and resulted in the lowest SdD level at the end of the trial. Results suggested that less persistent propagules could have played a part in the disease development. This article is protected by copyright. All rights reserved. |
| Databáze: | OpenAIRE |
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