Dry beans (Maverick) were planted at Underwood on May 24 into 30-inch rows at 60 lb/A in a conventional tillage system. Individual plots were 10 x 22 ft and replicated four times. Prowl, Valor, and Spartan were applied preemergence (PRE) on May 25. Postemergence (POST) treatments were applied on June 22 to 1-2 trifoliate dry beans. The primary weeds present were wild mustard (Wimu, 2-4 lf, 1-2 per sq ft) and green/yellow foxtail (Foxtail, 1-2", 30 per sq ft).

We evaluated dry bean tolerance and weed control with four experimental herbicides. We observed no injury with Raptor or Reflex. Raptor provided good to excellent control of wild mustard and foxtail spp. Valor caused moderate initial injury, but the dry beans appeared to recover over time. Spartan caused significant injury throughout the season. The soil pH at Underwood is 7.5. Spartan caused almost no injury in studies at Minot where the pH is lower. Wild mustard control with Basagran was poorer than expected.

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Last Updated: Thursday, May 27, 2004 02:49:18 PM
Published by North Dakota State University