Frost

With every second year, on average, delivering frosts significant enough to wipe out tens of millions of dollars of Western Australian crops, it is no surprise that the state’s grain growers place frost management at the top of their research, development and extension priority list.

The occurrence and severity of frost is spatially variable with the frost ‘window’ widening and the number of frost incidence increasing. The average loss from frost is conservatively estimated as $400M per annum. The Grains Research and Development Corporation’s National Frost Initiative coordinates a $4M per annum program of genetic, environmental and management approaches to deliver solutions for the grains industry. The department coordinates the management node of this initiative. The focus is on cereals, particularly wheat, as this is the dominant winter crop in all regions and thus underpins the sustainability of farm enterprise and farming systems.

Articles

  • Frost risk occurs virtually every year across southern and eastern agricultural regions. Actual occurrence of frost is determined by location and landscape factors as well as climate.

  • The Screening of Frost Tolerance in Cereals project screened (2012–2021) wheat and barley varieties in frost prone areas across Australia with the aim to provide a ranking value for growers and adv

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

  • A new guide has been published to assist canola and pulse growers to identify frost damage and consider crop management decisions. Frost damage reduces crop yield and grain quality.

  • Frost damage to braocacre crops is a significant annual production constraint for localised parts of the Western Australian wheatbelt.

  • Harvesting a frosted crop brings another layer of complexity to an already busy time of year.

  • FlowerPower is an online tool to predict cereal flowering dates (or cutting dates for oats) in your location.

  • Image 1: Frost damage at booting vs healthy head

    All winter grains susceptible to frost. Wheat is more susceptible then barley at flowering, but it is not known if barley and wheat have different frost susceptibilities during grain fill.

  • In September 2017, six department research officers presented at the biennial Australian Agronomy Conference in Ballarat, Victoria.

  • Mottled pods

    Of the pulses, field peas are more vulerable to frost due to thin pod walls and exposure of flowers to frost.