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The term 'residual' applies to a number of herbicides that have a long lasting activity in the soil. These herbicides are often applied directly to the soil prior to planting crops, pre-emergent.
Summer weeds can rob subsequent crops of soil nitrogen and stored soil water. They can also reduce crop emergence by causing physical and/or chemical interference at seeding time.
Windmill grass (Chloris truncata) is a native species and is the tenth most common summer weed species in the Western Australian wheatbelt.
Hyssop loosestrife (Lythrum hyssopifolia) is a widely distributed weed in the south west of Western Australia.
Annual ryegrass (Lolium rigidum) is one of the most serious and costly weeds of annual winter cropping systems in southern Australia.
Herbicides play a vital role in integrated weed management programs.
Options for control of winter broad leaved weeds, in pastures, is a common inquiry. A fairly reliable method is spray grazing.
Spray-topping is a very effective method for managing annual grass seed set in pastures.
Testing for herbicide susceptibility allows you to determine what herbicide options are still available to control weeds on your farm.
Herbicides can be applied by a variety of means including boom sprayers, aerial spraying, misters, blanket wipers, rope wick applicators, weed seekers and back-pack sprayers.