| dc.description | The topic is weed infestation of sunflower crops in North Dakota in 1972. Sunflowers (Helianthus annuus L.) are considered to be good competitors with weeds. However, in 1972, many sunflower fields in North Dakota had well-established weed infestations and the sunflowers appeared stressed. This article addresses research performed to alleviate sunflower infestations. Several studies were conducted to determine the yield losses from weed competition in sunflowers. Research was conducted on the competition of wild mustard, foxtail (green and yellow), and natural weed infestations with sunflowers. Most of the competition from weeds occurred within four weeks after emergence. Presently registered herbicides gave good foxtail, redroot pigweed, and common lambsquarters control but poor wild mustard control. | |
