3 Options For Controlling The First Flush Of Weeds Before And After Sowing

Whether you’ve finished sowing or just started, last week’s downfall has been a good break for all. However, it also means that we will begin…
June 20, 2022Ag Chem Back to All

Whether you’ve finished sowing or just started, last week’s downfall has been a good break for all. However, it also means that we will begin to see our first flush of weeds for the season. So, whether you have sown dry, are going for your first knockdown, or sneaking in a hit before the crop emerges, we’ve got some options for you.


1. Double-knock

Our first option is to double-knock before sowing. This often involves an application of glyphosate, followed three to fourteen days after by an application of paraquat. From the resistance tests we conducted with some of our growers over summer, we are starting to find glyphosate resistance building more regularly. Hence, this approach is crucial to slow the development of resistance and should be done as much as possible. We also have a new product, Guerrilla from Imtrade, which we believe is worth looking at for the paraquat part of this application. Just remember to adhere to any plant backs before sowing.


2. Split Applications

Our second option is split applications. Split applications can be conducted with Boxer Gold to assist in controlling a persistent ryegrass population, as per the following label instructions:
“Apply pre-plant and incorporate mechanically by the sowing operation (IBS). Application should be made to a moist seedbed up to 7 days prior to planting. Follow with the post-plant application as soon after sowing as possible, but before the crop and weeds emerge. Sufficient rain to thoroughly wet the top 3 to 4 cm of soil should occur within 10 days after each application. At planting, avoid soil throw into adjacent seeding rows or sites where furrow walls may collapse.”


3. Spikes

Finally, there are spikes. Spikes should always be added when using glyphosate in a knockdown to assist with the kill. There are a few options available, whether it is:
Oxyfluorfen (Striker/Goal) – the cheapest spike best on button-sized weeds when paddocks won’t be grazed after.
Or Hammer or Nail (Carfentrazone) – used when weeds start getting bigger and can be grazed the following day.
Or, Terrad’or or Sharpen – our best options for bigger weeds. If you haven’t already had a look at Terrad’or we recommend it. Remember to add in Hasten at 1% with these two products and watch canola plant backs.


Remember, this is general advice, and your individual situation may vary.
So, if you’d like more advice about your particular situation, please give one of our agronomists a call. We are happy to come out and find a solution that fits your farm.