[AT] garden question; potatoes

[Greg Hass]

First, tractor reference; I plant and cultivate with my Farmall Cub. I 
grow six rows of potatoes a little over 100 feet long. I was wondering 
if there is a spray that can be used to kill weeds after both potatoes 
and weeds are up. I have looked on the internet a couple of times and 
every spray I found must be applied before the crop is planted. One 
spray that looked like it might work said cannot be used on red 
potatoes, which is what I grow. I applied Preen before the potatoes were 
up and followed all instructions; but it did not control the weeds at 
all. Using a hoe on this many rows is not practical because of my 
allergies (anything with a handle; hoe, rake, shovel,etc. and my hands 
break out in blisters). Any help would be appreciated.

            Greg Hass