Bonide INFUSE Lawn & Landscape Fungicide Granules should not be applied more than directed on the product label which is 3lbs/1,000 sq ft/application (Do not exceed 12lbs/1,000sq ft/year).
No, Bonide INFUSE Lawn & Landscape Fungicide Granules contains Thiophanate-methyl 2.08% which is a fungicide. Molemax contains Castor Oil 10%
The Bonide INFUSE Lawn and Landscape Granules can treat Ascochyta Leaf Blight and Drechslera leaf spots, so whether this will work really depends on the specific disease you are treating. If you have Fabraea leaf spot and black spot, then you would need to use a topical spray fungicide to control this issue, such as Fung-onil Multi Purpose Fungicide Concentrate.