Hoses for deep injection of aquatic herbicide. A specialized aerial boom designed to produce a large droplet size at low pressure and low volume is the microfoil boom. When large areas are treated, it is often more efficient to meter the herbicide into the suction side of the pump and eliminate the time spent filling and mixing tanks. Normally, one or more plastic tubes are tapped into the pump suction line. Each tube has a valve for opening and closing the lines.
Tubes have an in-line orifice used to meter the correct amount of herbicide into the system.
Figure 11 shows how a typical herbicide withdrawal hose is constructed. A number of suction hoses can be used so application can continue without interruption. When the herbicide in the container being used is depleted, the applicator opens a valve in the hose in a second container and closes the valve of the empty one. Other than not using a tank and having the previously described equipment on the suction side of the pump, equipment used for spraying in this manner is very similar to tank-mix units. Basic system for withdrawing herbicide directly from container and water from boat bottom intakes.