Unfortunately, I still have to disagree. I do know a lot about all the different types of fungul diseases, but admittedly little about Carolyn's field of expertise concerning bacteria and viruses.
When it comes to Early Blight, Septoria Leaf Spot, Grey Mold, Rusts, and the such, there are very definitive "receptor sights". Some are through the stomata, most thread their way between the cell walls, and some pierce right through the epidermis into the plant cells.
There is no proprietary knowledge Ortho has or had. Fungi do what fungi have done since creation. The metallic based fungicides that destroy fungal spores in plants are the same metals used in humans when we develop fungal infections.
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