Per the product label for Presidio Fungicide: Begin application when crop and/or environmental conditions favor disease development. Make applications on a 7 to 14 day interval, depending on disease pressure, unless otherwise noted under crop specific use instructions. Under severe disease pressure or if rain is expected, use the higher labeled rate and shortest interval.
Presidio Fungicide can be used on tomatoes at the rate of 3 to oz per acre for late blight. Please see the label for full application instructions.
