| Autor: |
Turci, V., Ferrara, M., Pentimone, I., Palumbo, A. D., Ippolito, A., Nigro, F. |
| Předmět: |
|
| Zdroj: |
Journal of Plant Pathology; Dec2012 Supplement, Vol. 94 Issue 4, pS4.82-S4.82, 1/4p |
| Abstrakt: |
The effects of soil texture and water content on the inoculum density (ID) of Verticillium dahliae microsclerotia was tested in a series of 24 lysimeters containing clay (C) or sandy (S) soil artificially infested with the pathogen. In the lysimeters, seedlings of artichoke cv Opal were transplanted and two water regimes (33% and 100% of the evapotranspiration, ET) were compared. The experimental design was a split plot with three replications (soil texture as the main treatment and water regime as the secondary treatment). Lysimeters were periodically sampled over a 3-yr period, and the ID was determined by the plate-dilution method. Regardless of the water regime and soil texture, ID showed a seasonal variation, with significant increase between February and April; conversely, the lowest ID values were found in July and September. At 0-25 cm depth, ID values showed a larger fluctuations in the S than in the C soil for both water regimes tested. Moreover, irrespective of the water regime applied, higher ID of microsclerotia was found in the S soil as compared to the C soil. At 25-50 cm depth, the water regime exerted opposite effects, determining significantly lower and significantly higher ID values in S than in C soil at 33% and 100% ET, respectively. Information obtained in this study may represent a starting point for a better understanding of the factors affecting the population dynamics of V. dahliae microsclerotia in the soil, thus allowing the development of more effective integrated strategies for controlling Verticillium wilt of artichoke. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
