Cryptogamic Disease Incidences For Some Grapevine Varieties Under The Climatic Conditions in the Silvania Vineyard

This work aims to evaluate the incidence of cryptogamic diseases for different grapevine varieties according to a phytosanitary treatment protocol, in specific climatic conditions. The research was conducted in the vineyard located outside the village of Nușfalău, Sălaj County, on grapevine varieties Fetească neagră, Merlot, and Cabernet Sauvignon. The resistance level to the main cryptogamic diseases: Plasmopara viticola, Uncinula necator and Botrytis cinerea was evaluated under the climatic conditions of the year 2024 and under ten phytosanitary treatments. Several series of observations and determinations were performed during different BBCH phenophases, during which the frequency and intensity of the attacks were assessed, data that formed the basis for calculating the rate of attack. The research results highlighted the sensitivity and resistance levels of the three studied varieties to the attacks. Thus, the highest resistance to cryptogamic diseases was exhibited by the Cabernet Sauvignon variety, while the lowest resistance was found in the Fetească neagră variety. Knowing the sensitivity and resistance levels of grapevine varieties cultivated in a specific vineyard/area allows for the introduction of varieties with higher resistance on larger surfaces and the development of differentiated phytosanitary treatment schemes, thus reducing costs and effectively controlling cryptogamic diseases.