Pre Sowing Knockdown Herbicides

Increasing reliance on Glyphosate in the farming system has lead to an increase in Glyphosate resistant weeds.  Alternatives such as Spray.Seed or Gramoxone should be used where appropriate, to reduce the build-up of Glyphosate resistant weeds. For larger weeds and dense populations, Glyphosate is most appropriate.

Spray.Seed and Gramoxone are both contact herbicides.  Both require thorough plant coverage and are most effective when weeds are small and actively growing.

Spray.Seed is more suitable where there is a mix of both grass and broadleaf weeds.  Gramoxone is more suitable where predominately grass weeds are present.

When weeds are small and broadleaves are present, adding a spike rate of a broadleaf herbicide will improve results. As an example, a paddock programmed to have 35 g/ha Logran applied IBS, may have 1–3 leaf grass weeds plus small Paterson’s Curse present.  Adding 800 ml/ha Gramoxone to the Logran would provide effective control.

Alternatively, 1–5 leaf grasses and 2–4 leaf Capeweed and clover, may be controlled with 1.0 L/ha Spray.Seed plus a spike rate of Lontrel.

Other products which are compatible with Spray.Seed and Gramoxone include Ally, Dicamba, LV Ester 680, Triazines, Diuron, Trifluralin, Avadex Xtra and Goal.  Plant backs need to be considered before use.

The fast acting contact nature of Spray.Seed and Gramoxone, allows both products to be mixed with Trifluralin and incorporated after one hour.  This is preferable to mixing Glyphosate with Trifluralin.