If you are growing orchids or some other thick tissue species, then yes there is a real and always present danger of bacterial wet spot. However these are caused by the cultivator and the environmental conditions provided. Sm-90 or Phy-20 will work systemically.
In the case of cannabis, I have never in all my years seen a leaf get a bacterial infection from wet soil. There is a difference between the leaf having some wet soil and being buried under the soil!
Cannabis leaves have to transpire O2 and take in C02, all through stomata pathways. If the stomata are clogged from mud, then they eventually will wilt and the die. This action is finalized by the plant in which case can sense a compromised leaf and the progression of decay. The plant will abort that leaf's purpose/function and consume all available nutrients from it before it sheds the useless leaf.
Now,... assuming you are in soil, soilless amended, using any benni's and carb loading or just simply adding a carbohydrate source during bloom, you are feeding the good microbes, and these ward off any pathogenic organisms from taking hold.
Take a deep breath.......exhale........ you just inoculated your yap with purple sulfur bacteria, lacto bacillus, and other various bacillus strains, ect... Plants use these too, you just like to buy them diluted in water, whereas I collect them from the plants environment and isolate colonies to agar or blood and then change there environmental conditions. This is useful for endo-spore forming strains such as bacillus, because the spores will be modified to survive a new environment from which you choose for cultivation of plants, ie... high pressure lines, excessive temps +/-, and also form a resistance to antibacterial agents used in a IPM program. This allows you to eradicate a pathogen without harming your benni.
and also just realised how poor the yields are on autos. won't make that mistake again, i hope!
