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'Crop-topping' is the late application of herbicides to prevent weed seed-set.
Spray-topping is a very effective method for managing annual grass seed set in pastures.
Hyssop loosestrife (Lythrum hyssopifolia) is a widely distributed weed in the south west of Western Australia.
Two control timings were investigated to control weeds in fencelines, once early in the year with a good residual and a knockdown, followed by another one later in the season (after the seeding and
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.
The use of phenoxy herbicides is restricted in Western Australia (WA) under the Aerial Spraying Control Act 1966 and the Agriculture and Related Resources Protection (Spraying Restrict
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.