Liquid, applied at times of adequate moisture. Areas too large to spray with a skid sprayer beg for a high volume rig as is used on golf greens or a sprayer modified to apply 1+ gallons per 1000.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738