Study Name: Weed control in field peas

Study Number: 9917

Objectives: Evaluate weed control and crop tolerance to Raptor, Spartan, and other herbicides.

Results: Raptor caused slight stunting in the peas, which generally recovered over time. Injury was higher when Raptor was tankmixed with Quad 7 or COC compared to NIS. Yields were 200-300 lbs lower with Quad 7 or COC.

Valor caused slight injury to the peas, generally observed as stand reduction. Yield was similar to or higher compared to most Raptor treatments. We saw excellent pea tolerance to Spartan in 1997 and 1998.

In 1999, Spartan caused slight to moderate crop injury that increased with rate. There was more injury with the PPI than the PRE applications. The injury is likely due to high moisture conditions at planting and time of application. There was a light rain during the PRE applications. We will repeat this study in 2000.

Any product containing flumetsulam (Broadstrike + Treflan, Python) appear to cause too much injury to peas. We will continue evaluating Raptor, Spartan, and Valor for crop tolerance.

Raptor, Valor, Spartan, Sonalan, and Prowl generally provided excellent control of redroot pigweed. Basagran, Sencor, and Axiom were weaker on pigweed which likely caused the lower pea yields.

Table. Weed control in field peas.

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