If you didn't know any better, you would look at this
infested soybean field and think the weed problem wasn't too bad. Wrong. Wrong. Wrong.
Underneath those spindly, innocent looking shoots are extensive rootstock systems. Try to
dig them out, no way. They can go 10 feet deep (3 meters) or more in the soil. Try to
cultivate or use tillage, all you do is stimulate rootstock buds to germinate and it all
starts over again. Hemp dogbane is a pain in the....
Get it early. Seedling:
Start to worry. Leaves and stems:
Notice the milky sap (left) being exuded from the severed
Flowers and seedheads: