How disease suppression on leaves works is no secret. On the leave surface, each leave cell has many ports where fungi and bacteria can connect to. This is a normal process for plants. Good and bad fungi can connect. Good and bad bacteria can connect. Each micro organism takes up a connecting ”portal” on the leave cell. About 70% of the leave needs to be covered with fungi or bacteria to sustain a healthy environment. When a leave does not have most its “portals” taken up, pathogenic fungi and bacteria can take over. Pathogenic means “disease causing”. By spraying Compost Tea on the leaves, you are filling up most of the “portals” preventing pathogenic micro-organism from taking over. That’s it!! It’s very simple.
Vidoe on Microbiology For Leaves