Scouting Techniques Take a minimum of 20 weed counts across the field. Scout frequently because under hot conditions, redroot pigweed can advance through it's growth stages quickly, potentially escaping the window for herbicide application. This weed, because it is an alternate host for many crop insect pests, can indirectly affect the development of field crops. Loss Redroot pigweed causes yield losses in most crops, particularly under hot conditions. Control Tips Crops established before soils warm and hot weather sets in are very competitive with redroot pigweed.
Herbicides are available in most crops for control of redroot pigweed.
Watch growth stages carefully under hot conditions because the weed can quickly advance beyond the recommended stages for herbicide application.