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A new guide has been published to assist cereal growers to identify frost damage and consider crop management decisions.
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.
In 2021 the Department is conducting over 300 research trials across the state from Kununurra in the north to Esperance in the south.
Taking experimental measurements can be labour intensive and time consuming, in addition the methods chosen must be repeatable (regardless of operator) with small degrees of error.
This page hosts the 2018 frost trial information, handy project resources and the frost severity maps (from August).
Lupins should be harvested as soon as they are mature to minimise significant yield loss.
40% lower germination was measured from seed of plants exposed to wetting and drying at maturity.
Yield of chickpea crop-topped at the right time to control weed seed set was 59% of the unsprayed control.