• The weather conditions of the last few days in all areas favor the growth of powdery mildew. Also, most varieties are in a sensitive stage. It is recommended to continue to protect the crop with protective – therapeutic fungicides.
• It is recommended that the vine growers inspect the vineyard at least once a week and check leaves and weevils
• Count and record the total number of infestation sites, the percentage of affected stumps and a more subjective observation of the intensity of the infestation.
• The operation is considered necessary when an increase in the percentage of affected stumps is found over 10%, with the simultaneous existence of at least 20 sites of infestation.
• Check one week after surgery to see if the fungus has stopped growing