The incidence of esca in 5 vineyards (SCFI, GTFI, CBSI-1, 2, 3) in Tuscany was monitored from 1992 to 1994 in SCFI, from 1993 to 1998 in GTFI, and from 1995 to 1998 in CBSI-1, 2 and 3. Disease incidence varied from vineyard to vineyard and from year to year. SCFI was the vineyard most affected with an incidence of 63% in 1993, 20% in 1994, and 46% in 1992. However, symptom expression in individual plants was characterized by very marked discontinuity from year to year. As a result, only 8% of diseased plants in SCFI had foliar symptoms in all 3 years of the survey period. The percentage of consistently diseased plants went down to less than 1% in GTFI and CBSI-3 and was nil in CBSI-1 and 2. The cumulative disease incidence, calculated by counting all the plants that showed foliar symptoms at least once in the years surveyed, was 82, 50, 19, 12, and 10% in SCFI, GTFI, CBSI-3, 1 and 2 respectively. An examination of rainfall and air temperature parameters in relation to esca incidence did not detect any weather conditions especially conducive to esca. However, it seemed that a fresh, rainy summer is more favorable to the chronic form of esca while a hot, dry summer is more conducive to the acute form.

Epidemiology of esca in some vineyards in Tuscany (Italy) / G. Surico; G. Marchi; P. Braccini; L. Mugnai. - In: PHYTOPATHOLOGIA MEDITERRANEA. - ISSN 0031-9465. - STAMPA. - 39:(2000), pp. 190-205. [10.14601/Phytopathol_Mediterr-1536]

Epidemiology of esca in some vineyards in Tuscany (Italy)

SURICO, GIUSEPPE;MARCHI, GUIDO;MUGNAI, LAURA
2000

Abstract

The incidence of esca in 5 vineyards (SCFI, GTFI, CBSI-1, 2, 3) in Tuscany was monitored from 1992 to 1994 in SCFI, from 1993 to 1998 in GTFI, and from 1995 to 1998 in CBSI-1, 2 and 3. Disease incidence varied from vineyard to vineyard and from year to year. SCFI was the vineyard most affected with an incidence of 63% in 1993, 20% in 1994, and 46% in 1992. However, symptom expression in individual plants was characterized by very marked discontinuity from year to year. As a result, only 8% of diseased plants in SCFI had foliar symptoms in all 3 years of the survey period. The percentage of consistently diseased plants went down to less than 1% in GTFI and CBSI-3 and was nil in CBSI-1 and 2. The cumulative disease incidence, calculated by counting all the plants that showed foliar symptoms at least once in the years surveyed, was 82, 50, 19, 12, and 10% in SCFI, GTFI, CBSI-3, 1 and 2 respectively. An examination of rainfall and air temperature parameters in relation to esca incidence did not detect any weather conditions especially conducive to esca. However, it seemed that a fresh, rainy summer is more favorable to the chronic form of esca while a hot, dry summer is more conducive to the acute form.
39
190
205
G. Surico; G. Marchi; P. Braccini; L. Mugnai
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2158/223461
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