From the ArcaMax Publishing, Gardening Newsletter:
http://www.arcamax.com/news/gardening/s-2543-434185
To organically control weeds in your walk or garden, try flaming them with portable gas torches that heat weeds to 2,000F. Flamers kill annual weeds on one pass, but perennial weeds such as dandelions need torching every 2 weeks.
This news arrived on: 06/29/2009