Jump to navigation
Skip to Content
Claying involves adding and incorporating clay-rich subsoil into water repellent topsoil to overcome the repellence.
In-crop weed competition causes losses costing around $1 billion per annum for Western Australia.
Integrated weed management (IWM) is a system for managing weeds over the long term, and is particularly useful for managing and minimising herbicide resistance.
In an integrated weed management program, control of weeds should occur in the fallow, pre-sowing, early post-emergent and in pasture phases.
Waterlogging in the higher rainfall areas (more than 450mm) of South West Western Australian crops and pastures is a common cause of reduced plant growth in winter, especially on duplex soils.
Herbicide performance can vary greatly depending on a number of factors. These can include compatibility of herbicides, water quality, sprayer decontamination and controlling stressed weeds.
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.
In Western Australia, competition from 7-90 capeweed plants per square metre in a wheat crop can reduce crop yield by 28-44% and net return by 25-76%.
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.