Last Updated:
Thursday, May 27, 2004 02:49:18 PM
Published by North Dakota State University
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Study Name: Timing of weed control in imidazolinone-tolerant canola Study Number: 9906 Objectives: Evaluate weed control with Raptor applied at different rates and stages Results: Flea beetle pressure was extremely high in this field. Even though the canola seed was treated with Gaucho, we had to make a foliar insecticide application to help reduce the flea beetle pressure. The canola remained in the cotyledon to 2-leaf stage for an extended period due to the flea beetles and wet soil. The objective of this study was to compare weed control from soil-applied products with Raptor at different rates and timings. The primary weeds were kochia, foxtails, lambsquarters, and pigweed. Other species present were shepherdspurse, field pennycress, and biennial wormwood. Treflan and Sonalan did not control the mustard species or biennial wormwood, but generally provided good control of kochia, foxtails, lambsquarters, and pigweed. Treflan or Sonalan followed by a postemergence application of Raptor was as effective or better than Treflan or Sonalan alone. Raptor controlled foxtails, lambsquarters, pigweed, shepherdspurse, and field pennycress, but was weaker on kochia and biennial wormwood. The early application (cotyledon to 2-leaf) was not as effective as the later applications as it missed later flushes of weeds. Weed control with Raptor was generally higher with 4 fl oz compared to 2 fl oz. The split application of Raptor (2 fl oz + 2 fl oz) was also very effective on all weeds except kochia and biennial wormwood. Table. Timing of weed control in imidazolinone-tolerant canola.
a All Raptor treatments included NIS (0.25%) and 28%
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Last Updated:
Thursday, May 27, 2004 02:49:18 PM
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