The influence of climatic conditions on the main vine diseases in terms of chemicals application

This paper presents research results on the influence of climatic conditions on the occurrence and manifestation of main vine diseases. In the Blaj wine center the main grapes diseases are blight (Plasmopara viticola), mildew (Uncinula necator) and gray rot of grapes (Botrytis cinerea). To track the evolution of the main pathogens of vines the main climatic factors were monitored (air temperature, precipitation and relative humidity). Climatic conditions specific for each experimental year influenced differently the attack of main vine pathogens, this is due to climatic conditions which are very favorable to pathogens, leading to their appearance on leaves and bunches. Treatments were applied according to the time when the first infection was pointed out and the evolution of climatic factors.