Great Southern

Raised beds are a long-term option for waterlogged sites and increasing crop yield on target areas. The Department of Primary Industries and Regional Development recommends that raised beds are part of a whole-farm water and salinity management program.

Waterlogging causes significant reductions in plant growth in some years and some environments in the high rainfall (greater than 600mm annual rainfall) areas of South West Western Australia.

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. Herbicide resistance does not equate to poor performance of a herbicide.

The most accurate way to estimate the weed population of a paddock is to count the number of plants in an area of known size at a number of locations. Use a quadrant, which may be square or circular, to carry out weed plant counts.

Claying involves adding and incorporating clay-rich subsoil into water repellent topsoil to overcome the repellence.

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.

Herbicides play a vital role in integrated weed management programs. Knowledge of the mechanisms and activity of herbicides will improve the impact and sustainability of herbicides as a weed management tactic.

In-crop weed competition causes losses costing around $1 billion per annum for Western Australia. There are very effective strategic and tactical options available to manage weed competition that will increase crop yields and profitability.

Spring frosts occasionally cause drastic reductions in crop yields in localised parts of the Western Australian wheatbelt. Different crops will show varying symptoms and be susceptible at a range of growth stages.

Wheat is highly susceptible to frost damage between ear emergence and flowering – often termed reproductive frost.

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