Barley grass

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Tactics for integrated weed management

Table 1 Tactics to consider when developing an integrated plan to manage barley grass (Hordeum spp.)
Tactic name Most likely % control (range) Comments on use
Crop choice and sequence 85 (0–95) Avoid planting barley in infested areas
Herbicide-tolerant crops 80 (40–95) Triazines and imidazolinone herbicides provide useful control in tolerant crops
Burning residues 50 (0–75) Dropping chaff and straw into windrows improves control
Inversion ploughing 90 (70–99) Use skimmers to ensure deep burial
Delayed sowing 60 (50–90) Level of control depends on autumn break. Use in combination with Tactic 2.2a
Fallow and pre-sowing cultivation 50 (30–80) Requires dry weather following cultivation
Knockdown (non-selective) herbicides for fallow and pre-sowing control 80 (50–90) Works best if delayed until the 2–4-leaf stage after good opening rains
Double knockdown or ‘double knock’ 80 (60–95) Works best if delayed until the 2–4-leaf stage after good opening rains
Pre-emergent herbicides 80 (75–90) Sulfosulfuron provides good control in wheat
Selective post-emergent herbicides 90 (80–95) Several ‘fop’ herbicides provide good control in broadleaf crops. Sulfosulfuron provides good control in wheat
Pasture spray-topping 60 (50–90) Graze heavily to induce more uniform emergence of heads. Timing is critical. Graze or spray regrowth
Silage and hay crops and pastures 50 (30-80) Silage provides better control than hay making. Graze or spray regrowth
Renovation crops and pastures; green manuring, brown manuring, mulching and hay freezing 75 (50–90) Graze heavily to induce more uniform emergence of heads. Timing is critical. Graze or spray regrowth
Grazing; actively managing weeds in pastures 30 (0–50) Use high stocking rates early in the season to reduce numbers, and late in the season to reduce seed-set on infested paddocks

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