Wild oats

Page last updated: Wednesday, 17 February 2021 - 10:29am

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Tactics for integrated weed management

Table 1 Tactics to consider when developing an integrated plan to manage wild oats (Avena fatua and A. ludoviciana)
Management tactic Most likely % control range Comments on use
Crop choice and sequence 95 (30-99) Summer crop — winter fallow choice is very effective; numbers build up in pulse crops
Improving crop competition 70 (20-99) Crops at optimum sowing rates are very effective. High levels of control for barley, much lower for wheat
Herbicide-tolerant crops 90 (80-99) Good control achieved
Autumn tickle 40 (30-60) Depends on seasonal conditions
Knockdown (non-selective) herbicides for fallow and pre-sowing control 80 (70-90) Wait until youngest plants have two leaves if possible. Late germinations will not be controlled
Pre-emergent herbicides 80 (70-90) Works best when combined with competitive crops
Selective post-emergent herbicides 80 (70-90) Test for resistance before spraying. Use in combination with competitive crops. Rotate herbicides
Spray-topping with selective herbicides 90 (60-99) Flamprop methyl is very effective. Up to six confirmed cases of resistance at time of writing although this resulted from repeated late post-emergent application. Best results with competitive crops, warmer conditions and at very early jointing stage of wild oats
Pasture spray-topping 80 (70-90) Graze or spray survivors. Hay freezing works well
Silage and hay — crops and pastures 97 (95-99) Harvest prior to wild oat grain fill. Control regrowth
Grazing — actively managing weeds in pastures 75 (60-80) Graze heavily and continuously during spring
Weed seed collection at harvest 70 (20-80) Works well on early harvested crops before wild oats drop their seeds

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