Abstract:
Phomopsis viticola, in poorly managed vineyards can produce a lot of
damage due to its year to year infection pattern. In combination with a high spore
reserve from the previous year, this causes reduced grape yields. This study aims to
assess the Phomopsisviticola attack in Târnave vineyards during May-July 2020.
The data (frequency and intensity of the attack) was collected from Crăciunelu de
Jos, and the attack degree (AD) was calculated before and after the treatments for
Saugvinonblanc, Riesling italian, Fetească regală and Traminer roz grapevine
varieties. The AD before the treatment with contact and systemic products was
between 27.80% and 4.10%, after the treatments of the first period (May-June 2020)
the AD was reduced at values between 3.40% and 0.83% and after the treatments of
the second period (June-July 2020) the AD had the values between 9.00% and
12.40%. In conclusion, the fungicide treatments administrated are efficient in
managing Phomopsis viticola in vineyards from Transylvania.
