Which is why I do not have a lawn application gun in the truck or attached to any of my power sprayers. All of my lawn applications are sprayed through a boom or a single nozzle wand with the proper fan tip for the spray volume required. Application volume can range from 20-160 gallons per acre.All the water does is allow for uniform spreading of the pesticide--water has no other value. We hate water--it kills time and profit.
Studies were done at NCSU which showed more weed control activity of glyphosate with no dilution--spraying straight in a Herbi controlled droplet appicator.
A lot of water/solution is needed in a hand hose/hand gun operation as this is a gross method of application and not a percision one. One actually wonders how such an application does not violate label restrictions on overlap and spot rate per ac. maximums.