When using herbicides accurate distribution is essential. The commonly used granular applicators are drop spreaders and centrifugal spreaders that are carried or pushed. Many granular herbicides may also be hand applied using a shaker can. Apply granular herbicides in two directions to increase the chances of uniform distribution. Determine the total amount of herbicide to be applied, divide it into two equal portions, apply one-half in one direction and the other half perpendicular to the first application.
Centrifugal spreaders cover a wider area faster with fewer missed areas than drop spreaders.
But a centrifugal spreader may not apply the herbicide evenly across the swath. The outer edges of the pattern will probably receive less herbicide. An advantage of drop spreaders is that they are less likely to have their distribution pattern disrupted by wind. Another advantage is avoiding application of herbicides to walks and driveways. When using a drop spreader, make the swaths meet without overlaps or skips.