Weeds

Weeds pose a serious risk for primary producers as they can impact on market access and agricultural production.

In 2006/07, each Western Australian agricultural business spent an average of $29 376 ($341 million total) on weed control (Australian Bureau of Statistics).

Weed control is a shared responsibility between landholders, grower groups, biosecurity groups and the Department of Primary Industries and Regional Development.

To protect WA’s agriculture, the department:

  • works with landholders, grower groups, community groups and biosecurity groups
  • regulates weeds under the Biosecurity and Agriculture Management Act 2007
  • provides a weed identification service
  • provides a predictive simulation tool called weed seed wizard
  • provides information on weed control, crop weeds, regulated/declared plants and herbicides
  • contributes to social science through weedwatcher.

For advice on weeds search our website, the Western Australian Organism List or contact our Pest and Disease Information Service (PaDIS).

For diagnostic services, please contact our Diagnostic Laboratory Services.

Articles

  • This management strategy provides an opportunity to control weed seed set in the pasture and during harvest.

  • Flaxleaf and tall fleabane (Conyza spp.) are emerging weeds in Western Australia, germinating in spring and becoming major weeds in summer.

  • Doublegee or spiny emex is a significant weed in Western Australia. It is a vigorous annual herb with a strong tap root and a long, fleshy, hairless stem.

  • Wild oats (Avena fatua and A. ludoviciana) represent a large cost to cropping. Wild oats are highly competitive and when left uncontrolled can reduce wheat yields by up to 80%.

  • The Pome and Summer Fruit Orchard Spray Guide 2020-21 provides information on chemical products, both registered and those as minor use permits, to control insect, mite and mollusc pests, diseases

  • Skeleton weed (Chondrilla juncea) is a declared pest in Western Australia (WA).

  • Silver grass is an annual grass occurring in both cropping and grazing regions across Australia. There are several species, the most common being Vulpia myuros and V. bromoides.

  • Wild radish (Raphanus raphanistrum) is highly competitive in crops and can cause a yield loss of 10-90%.

  • Herbicide resistance is the inherited ability of an individual plant to survive a herbicide application that would kill a normal population of the same species.

  • Pasture manipulation is the application of herbicides for grass control early in the growing season (autumn or early winter).

    It is often the preferred option for grass control.

Filter by search

Filter by topic