In this context, Equation@ Pro should be used in a program at 2 consecutive treatments at 7 days interval. In high disease pressure, renew treatment after 5 days using another fungicide. These two treatments applied early season usually occur after a sequence of 2 first treatments with mancozeb or maneb; Equation@ Pro is thus relevant to the third and fourth processing blight treatment program and at the latest at BBCH 35 of the potato (50% of plants adjacent lines touching).