Study Name: Wild oat control in Liberty Link canola

Study Number: 9933

Objectives: Compare combinations of soil applied herbicides and Liberty for wild oat control

Results: Due to heavy rains in early May the canola was not seeded until May 18. Flea beetle populations were high and caused significant damage to the canola. We originally planned to apply all postemergence treatments at the same time. However, wild oat pressure was heavy and the plants much larger in the Liberty alone treatments (30 plants/sq ft, 3-4 leaf wild oat) that we decided to apply them earlier than the other treatments. Other plots had about 10 plants per sq ft and wild oat was about 1-leaf on June 5. We treated the remaining plots on June 11 when wild oat were in the 2 to 3-leaf stage. Liberty was more effective on the smaller wild oat compared to the plots where the wild oat density was higher and plants were larger. Increasing the rate of Treflan above 1 pt did not improve weed control or yield. Liberty was more effective on lambsquarters than Treflan or Sonalan.

Table. Wild oat control in Liberty Link canola.

^a All Liberty treatments included AMS (3 lb/A), Poast applied with 2.5% MSO (Dash)
^b A=PPI; B=coty to 2-leaf canola; C=3-leaf canola

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