Common Purslane Competition in Table Beets and Snap Beans

Competition studies in field trials were conducted between common purslane ( Portulaca oleracea L.) and table beets ( Beta vulgaris L., var. Detroit Red) and between common purslane and snap beans ( Phaseolus vulgaris L., var. Eastern Butter). Common purslane control was most critical during the first 2 weeks after beet and bean emergence. Common purslane control for longer than 2 weeks did not increase beet or bean yields. The longer common purslane was allowed to compete after beet or bean emergence, the more yields were decreased. Common purslane was a stronger competitor in beets than in beans. The faster and taller-growing bean plants provided more competition than did beets. Cultivation between rows until lay-by increased both beet and bean yields.