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These are post-emergent grass control herbicides used for annual ryegrass and/or wild oat control in wheat, barley and broadleaf crops or non-selective grass control in broadleaf crops.
This includes contact herbicides from a range of chemical groups that require uniform spray coverage to be fully effective.
Group I herbicides are used for broadleaf summer weed control or selective broadleaf weed control in cereals. Damage can be caused by soil residues or spray contact.
Sulfonlyureas and sulfonamides are systemic herbicides that are used for pre and/or post emergent grass and/or broadleaf weed control in cerealsand are highly toxic in canola.
A range of group C herbicides are registered for use in triazine tolerant (TT) varieties, but other varieties are susceptible to both pre and post emergent applications.
Glyphosate is a systemic knockdown herbicide that is used extensively for brown fallow, summer weed or pre-seeding weed control, or selective weed control in glyphosate resistant crops.
Group F herbicides are registered for selective control of wild radish, wild mustard and wild turnip in cereals, legume crops and legume pastures. Canola is less affected than brassica weeds