For efficacy, they need to be foliar-applied. Fertilizers, fungicides, insecticides and preemerge herbicides can be effectively applied as granules however, postemerge herbicides present a problem. Using granules eliminates both the need to haul a heavy tank of water and also the difficulties inherent in liquid application to lawns. I like the large (4 gallon) tank to cover a large area without frequent refilling.The Problem: Most lawn fertilizers and chemicals can be more easily applied as granules rather than liquid sprays. The unit comes well packaged and ready for use. All backed by a 3-year warranty, look to RYOBI for performance and versatility.Ordered the 4 gallon backpack sprayer to apply control for ants and application of weed killer to the landscape.

The sprayer looks and pushes much like a rotary spreader but carries a small jug of liquid and has a peristaltic (hose) pump on one or both wheels to force the liquid through one or two broadcast nozzles. A small non-powered walk-behind sprayer is available that meets this need. For this system to be practical, however, an applicator needs a simple, easy way to do the spraying. The Solution: A very practical solution for lawn care service professionals is to apply all products except broadleaf postemerge herbicides as granules and then spray broadleaf herbicides on an as-needed basis.

A selective hormonal weedkiller that controls broadleaf weeds only.

Weed Sprayers For Large Areas