All competition removed. This sprayer is designed to promote the growth of {everything it doesn't kill}. Those 'weeds' will have as much benefit from the spot-

All competition removed. This sprayer is designed to promote the growth of {everything it doesn't kill}. Those 'weeds' will have as much benefit from the spot-spraying as the crop. Which is either significant, or it's negligible (and this sprayer is useless, so probably not that)