In a vineyard soil on Pliocene deposits, bulk and rhizosphere samples of profiles under apparently healthy vines and under those with symptoms of esca were studied for pedological, chemical and biochemical properties. This study has highlighted soil properties that are negative for plants and rhizosphere microorganisms. Among those, some depend on pedo-climatic conditions (soil erosion, summer cracks, poorly draining conditions), others depend on soil and vine management (scarcity of nutrients and organic matter and an excessive presence of Cu due to the use of pesticides). We hypothesise that esca attacks plants in certain areas of a vineyard because the different soil conditions in these areas are negative for one or more of the highlighted properties. Thus, the combination of a depressed soil microbial community and weak plants can result in the loss of their pathogen resistance.
Influence of soil factors on esca infection in a vineyard soil developed on Pliocene deposits. Tuscany, Italy.
AGNELLI, Alberto
2007
Abstract
In a vineyard soil on Pliocene deposits, bulk and rhizosphere samples of profiles under apparently healthy vines and under those with symptoms of esca were studied for pedological, chemical and biochemical properties. This study has highlighted soil properties that are negative for plants and rhizosphere microorganisms. Among those, some depend on pedo-climatic conditions (soil erosion, summer cracks, poorly draining conditions), others depend on soil and vine management (scarcity of nutrients and organic matter and an excessive presence of Cu due to the use of pesticides). We hypothesise that esca attacks plants in certain areas of a vineyard because the different soil conditions in these areas are negative for one or more of the highlighted properties. Thus, the combination of a depressed soil microbial community and weak plants can result in the loss of their pathogen resistance.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
