The Cavity Needle disperses the fluid from the tip of a rounded over, heavier gage needle.
Injecting into a porous stem plant is now possible with this needle.
No longer does the cane have to be hollow for injection to work.
This needle can deliver from .05ml up to 7ml as the needle is being retracted out of the cane.
Example: (pictured) Blackberry cane is cut to allow for injection (any part of cane will do). Only .05mls is required to translocate through and into the plants root system for an exceptional control rate without harming any surrounding species.