Return to Canola Council Home
Rain has set back weed spraying. Early canola crops are near the end of their spray windows, even though some fields have not received a first pass and some fields got a first pass but need a second. Label application windows: Glyphosate: Anytime up to and including the 6-leaf stage of canola. Liberty: Cotyledon stage up to the early bolting…
Weeds
-
-
LL: Use high water volumes for Liberty and use the Group 1 tank mix. RR: Use the 180 ae rate of glyphosate if you plant to hit grassy weeds first and follow up later. CL: Consider Odyssey DLX for enhanced grassy weed control in Clearfield canola… -
If an insect or disease threat is present at economic thresholds and within the weed control window, applying herbicides with other pest control products can add to production efficiency and cost management. Before mixing, make sure all products are compatible. And if they are compatible, they may have strict rules for mixing order…
-
Cool cloudy days after cool nights will result in lower herbicide efficacy than applications made in warm sunny days. Cloudy days don’t provide the photosynthetic activity required for many herbicides, including Group 10 glufosinate. And nights near freezing followed by days with highs that barely reach 10 C will not provide high metabolic activity required for best results from Group… -
In-crop weed control should occur as early as possible since canola is much more vulnerable to weed competition prior to reaching complete ground cover. Past research has demonstrated an advantage of 3 bu./ac. for controlling weeds at the 1-2 leaf stage of canola versus 3-4 leaf, and a 7 bu./ac. advantage versus 6-7 leaf. At $12 per bushel, that’s $36… -
No time to wait? Growers who want to do a preseed burnoff and then get seeding may not want to wait 3-4 days for the weeds to recover from a frost. In this situation, growers should recognize that if they go ahead and spray right away, efficacy may be reduced. However, even with the lower efficacy, doing the burnoff and…
-
Adjuvant systems used in in-crop herbicides used in canola are very effective tank cleaners and will remove the smallest residue of herbicide remaining in the tank and deposit it in your sensitive canola crop… -
Seeding is a priority for many growers this week, but fields with a large population of weeds, especially advancing winter annuals, should get a pre-seed burnoff. For annuals and winter annuals, glyphosate needs only 24 hours to get to the growing point and set the control process in motion. After a day, the crop can be seeded. For perennial weeds,… -
Foxtail barley has proliferated in some fields that were unseeded last year due to excess moisture. If it’s in patches, tillage may be the best way to control it. Pre-seed applications when shoots are small and all energy is moving upward through the weed are not always that effective. Waiting until the foxtail barley is bolting may provide a better…
