Mancozeb fungicide and other traditional fungicides need to be stopped before harvesting, and in the period where they are not used there are sometimes problems with fungus that affect the product to be harvested. You can replace these with Oxidate and not have to worry about this problem anymore since Oxidate can be used right up to harvest, and is even approved for organic crops. It can be used in order to prevent and treat a large number of different plant and disease pathogens, keeping your crops from having large outbreaks of diseases. There is no mutational resistance to this product to worry about either.