After Azoxy 2SC Select Fungicide has been applied, you should be able to resume a normal watering schedule after 24 hours, as the product should be rain-fast at that point. Keep in mind that many diseases that require a fungicide for treatment are sometimes related to excess moisture, so it is advisable not overwater, to avoid encouraging disease development.
It is best to apply the Azoxy 2SC Select when you are not expecting rainfall or irrigation within 24-48 hours of the application. Please refer to the product label for complete application instructions for the disease you are targeting.