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weed density

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Catalogue: GRDC Publications
The use of economic thresholds of weed numbers based on their yield impact in the current crop alone is irrelevant!.. 10 use high crop sowing rates (6) crop-top lupins with paraquat (1) use seed-catching cart, burn dumps (10) a The number of years in which this treatment was applied is shown in parentheses... The tactics were able to compensate for the failure of post-emergent herbicides in years when they failed due to adverse seasonal conditions To explore the benefits of IWM further, the WeedRisk model was tested for a range of rotational and IWM options over a 20-year period for three key cropping weeds: wild oats, wild radish and annual ryegrass (Table E7, below)...
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Catalogue: GRDC Publications
A number of data sets used in this document on water and nitrogen effects of summer fallow weed management have been developed as a part of the GRDC supported Water Use Ef ciency initiative... In the right soil, deep stored soil water can have a water use ef ciency of up to 60 kg of grain/mm of stored water... Early weed control was vital to store and keep valuable subsoil moisture...
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Catalogue: GRDC Final Reports
A priority list of crop weeds in Victoria was developed in consultation with famers and agronomists... A survey of 28 lentil crops showed Indian Hedge Mustard (IHM) was also a major problem, with weed densities of 20/m 2 giving an estimated 50% yield loss... Future research should investigate its ecology and management...
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IWM

Catalogue: GRDC Media
Wild radish is one of the most widespread broadleaf weeds in Australian grain cropping and has developed resistance to many herbicide modes of action... GRDC-supported research has shown that while IWM principles may seem to be expensive and more complex than chemical control alone, using a range of control measures will pay for itself - both financially and in giving growers more control options for the future... For example, we showed that a three-year pasture phase can provide excellent control of the weed seed bank, and will still pay off over 10 years for a severe infestation," Dr Monjardino said...
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IWM

Catalogue: GRDC Media
Wild radish is one of the most widespread broadleaf weeds in Australian grain cropping and has developed resistance to many herbicide modes of action... GRDC-supported research has shown that while IWM principles may seem to be expensive and more complex than chemical control alone, using a range of control measures will pay for itself - both financially and in giving growers more control options for the future... For example, we showed that a three-year pasture phase can provide excellent control of the weed seed bank, and will still pay off over 10 years for a severe infestation," Dr Monjardino said...
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