Watch Out for Witchweed, 1963

Color - Sound - 16 mm - 00:13:30 Witchweed is a pretty, red-blossomed plant that looks harmless—but watch it. This parasite attaches itself to plant roots and is capable of devastating whole crops of corn, sugarcane, sorghum, rice, wheat, oats, barley, and more than 60 species of grass and sedge. Shows what is being done to control the spread of this parasitic plant and what methods of eradication have already been developed. 1562