From the Bcuzz website:-
"Just like man, plants also develop antibodies against disease germs, insects and fungi. These antibodies are called alkaloids. They are specific types of protein. B' cuzz Bio defence stimulates the production of these substances, making it very difficult for harmful organisms to survive."
Which we think basically means that it should provide a degree of protection against root rot and munching insects.
Spray directly onto plants just after lights out or in late afternoon if used outdoors - dilution rate 1-3ml depending on whether you are trying to cure a problem or prevent one.