Controlling summer weeds is a key strategy to conserving moisture and nutrients for the subsequent crop. This is a common practice implemented across medium to low rainfall cropping zones of Australia.
OFT contains more than 90 trials that have explored issues on managing summer weeds, including herbicide and tillage strategies, the use of herbicides and adjuvants and the latest spraying technologies including spot spraying. Trials covering particular weed varieties include: Awnless barnyard grass, Feathertop Rhodes grass, Liverseed grass, Wild radish, Stink grass and Fleabane. In tackling summer weeds, trials exploring aspects of residual herbicide effects on following crops are also provided.
For further information on summer weed management, refer to the following article from GRDC GroundCover:
Aims:
To determine the impact of grazing on soil condition and weed populations. This report is on findings after two years of grazing.
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To assess the effectiveness of a range of summer weed control options. The subsequent effect on yield as a result of weed control.
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To compare five control practices to determine the best weed management strategy for summer months on this particular soil type.
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To determine which summer weed control method is most efficient and economical.
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The aim of this trial was to determine the best options for controlling summer weeds using residual and knockdown herbicides with different adjuvants.
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To discuss summer weed control options.
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To investigate the effectiveness of a number of herbicide treatments for the control of summer weeds such as heliotrope, padi melons and medic.
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To discuss how to keep summer weed control cost effective.
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To evaluate the economic benefit and effectiveness of different herbicide treatments on mixture of summer grassses and melons.
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To measure the efficacy of coarser spray droplets on the control of two identified common summer weed species, and the influence of more adverse weather conditions.
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To measure the loss of soil water attributed to summer weeds and to quantify the impact of summer weeds on lost production.
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To evaluate a number of commercially available adjuvants to accompany glyphosate for summer weed control.
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To test the tolerance of the new strand medic, Angel, to sulfonylurea (SU) herbicide residues from a summer weed application.
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To quantify how paddock stubble load and weed burden during summer can affect available soil water, nutrients and subsequent crop yield.
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To monitor moisture retention and nitrogen accumulation under cultivated and chemical fallow regimes.
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To test whether sheep grazing in no-till systems damages soil and reduces crop yields.
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To discuss soil conservation and land use.
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To quantify the effect of paddock stubble management and weed burden during the summer fallow on crop available soil water, nutrients and yield.
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To inform readers about weed sensing: the use of a machine or instrument to detect a weed; a plant that shouldn’t be there
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To quantify how paddock stubble load and weed burden during summer can affect soil water, nutrients and subsequent crop yield.
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To identify some herbicide options for controlling Rosinweed.
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To demonstrate how managing paddock stubble load and weed burden (paddock surface conditions) during summer can affect subsequent crop yield.
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To demonstrate the effectiveness of weed sensing technology (WeedSeeker) for controlling problematic low population weeds (e.g. Prickly Lettuce).
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To present the main messages from the agronomy trial work undertaken in 2005.
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To investigate the response to nitrogen fertiliser on wheat.
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To investigate management options which reduce the risk of failure when growing wheat on wheat, or barley on wheat stubble.
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To improve the long term control of Rhizoctonia by increasing the understanding of the interactions between disease inoculum and natural soil suppressive activity and to improve the prediction and management of disease.
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To evaluate the influence of perennial row spacing and grass suppression on the performance of serradella summer sown into subtropical perennial-grass pastures.
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To evaluate alternative chemistry for fallow knockdown control of summer grass weeds. Specifically Feathertop Rhodes Grass and Button Grass.
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To evaluate alternative chemistry for fallow knockdown control of summer grass weeds.
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To evaluate residual herbicide tank mixtures for broad spectrum summer fallow weed management.
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To evaluate residual herbicide tank mixtures for broad spectrum summer fallow weed management.
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To evaluate residual herbicide tank mixtures for broad spectrum summer fallow weed management.
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To evaluate residual herbicide tank mixtures for broad spectrum summer fallow weed management.
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To evaluate residual herbicide tank mixtures for broad spectrum summer fallow weed management.
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To evaluate residual herbicide tank mixtures for broad spectrum summer fallow weed management.
Aims:
To evaluate residual herbicide tank mixtures for broad spectrum summer fallow weed management.
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To evaluate residual herbicide tank mixtures for broad spectrum summer fallow weed management.
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To evaluate residual herbicide tank mixtures for broad spectrum summer fallow weed management.
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To evaluate alternative chemistry for fallow knockdown control of summer grass weeds. Specifically Liverseed Grass and Awnless Barnyard Grass.
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To evaluate the efficacy of residual herbicides for fallow control of summer grass weeds.
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To evaluate the efficacy of residual herbicides for fallow control of summer grass weeds.
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To evaluate the efficacy of residual herbicides for fallow control of summer grass weeds.
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To evaluate the efficacy of residual herbicides for fallow control of summer grass weeds.
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To evaluate the efficacy of residual herbicides for fallow control of summer grass weeds.
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To evaluate the efficacy of residual herbicides for fallow control of summer grass weeds.
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To evaluate the efficacy of residual herbicides for fallow control of summer grass weeds.
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To evaluate the efficacy of residual herbicides for fallow control of summer grass weeds.
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To evaluate the efficacy of residual herbicides for fallow control of summer grass weeds.
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To evaluate the efficacy of residual herbicides for fallow control of summer grass weeds.
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To evaluate the efficacy of residual herbicides for fallow control of summer grass weeds.
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To evaluate the compatibility of mixtures of Group A and broadleaf herbicides for summer grass weed control. Specifically Feather Top Rhodes Grass.
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To evaluate the compatibility of mixtures of Group A and broadleaf herbicides for summer grass weed control. Specifically Feathertop Rhodes Grass.
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To evaluate the compatibility of mixtures of Group A and broadleaf herbicides for summer grass weed control. Specifically Liverseed Grass
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To determine effective rates and mixtures for the knockdown control of hard to kill summer grass weeds
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To determine effective rates and mixtures for the knockdown control of hard to kill summer grass weeds. Specifically Button Grass
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To determine effective rates and mixtures for the knockdown control of hard to kill summer grass weeds. Specifically Button Grass.
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To determine effective rates and mixtures for the knockdown control of hard to kill summer grass weeds. Specifically Liverseed Grass.
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To determine effective rates and mixtures for the knockdown control of hard to kill summer grass weeds.
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To determine effective rates and mixtures for the knockdown control of hard to kill summer grass weeds. Specifically Liverseed Grass.
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To determine effective rates and mixtures for the knockdown control of hard to kill summer grass weeds. Specifically Windmill Grass.
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To evaluate new and existing field pea varieties.
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To report on seed quality, nitrogen, screenings and black point in wheat and barley.
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To compare the economic and agronomic response between the paddock rotations of wheat on wheat, wheat on late pasture topping and wheat on chemical fallow. This investigation aims to identify winter fallowing as a low-risk rotational strategy for low rainfall cropping systems in the North and Eastern Wheatbelt region of Western Australia.
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To quantify how paddock stubble load and weed burden during summer can affect available soil water, nutrients and subsequent crop yield.
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To compare two methods for the establishment of pasture legumes (i) summer sowing where dormant hard-seed is drill sown into the paddock after the crop is harvested and (ii) traditional sowing where scarified seed is drill sown after the break of the season and knockdown weed control.
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To (i) determine possible associations between soil types and weed distribution within the Kwinana West and the Kwinana East Regional Cropping Solutions Network zones; and (ii) provide factsheets linking soil types to the top 5 weeds in each of the two zones, produced specifically for their zones and soils.
Aims:
To compare two methods for the establishment of pasture legumes (i) summer sowing where dormant hard-seed is drill sown into the paddock after the crop is harvested; and (ii) traditional sowing where scarified seed is drill sown after the break of the season and knockdown weed control.
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To evaluate effectiveness of ‘summer sowing’ hard-seeded serradella pod into established perennial grass pastures.
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To evaluate the effectiveness of establishing annual legumes into established perennial grass-based pastures by 'summer' sowing of hard-seeded serradella pod.
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To evaluate a range of herbicides for the control of large grass weeds when using optical spray application. Specifically Awnless Barnyard Grass.
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To evaluate a range of herbicides for the control of large grass weeds when using optical spray application. Specifically Awnless Barnyard Grass.
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To evaluate a range of herbicides for the control of large grass weeds when using optical spray application, especifically feathertop Rhodes grass.
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Failure to control annual weed species that persist through cropping phases facilitates replenishment/establishment of weed seedbanks. Consequently, this maintains weed interference in subsequent years of crop production. Harvest weed seed control (HWSC) has been widely adopted in Australia since its inception over three decades ago to prevent r… read more
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To report on discussions that there was an apparent increase in cultivation of fallows this year.
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To assess herbicide options to control button grass during summer.
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To measure the effectiveness of herbicides used in Clearfield and non-Clearfield cropping rotations to control problematic weeds in the Mallee including wild radish and brome grass.
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To investigate the dry matter (DM) productivity and nutritive value (NV) of a range of pasture species sown independently or in conjunction with Fathom barley at Hart in winter and summer.
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In southern Australian mixed farming systems, there are many opportunities for pasture improvement, providing positive impacts to both cropping and livestock systems. Dryland legume pastures are necessary in low to medium rainfall zones to support productive and healthy livestock, along with optimal production in crops following these pastures. … read more
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To investigate alternative break crop sequences and cereal herbicide control options that can increase profitability and reduce brome grass populations in the Mallee.
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To discuss common heliotrope on Victorian farms
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To assess whether the effects of grazing canola with sheep during the growing season: factors being assessed are yield and quality, dry matter production and grazing value.
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For a sub-tropical grass established in the Mallee environment, to assess the pattern and reliability of growth and its potential as a fodder source using simulation models.
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To report on the role and management of high density legume break crops in dryland dropping rotations.
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To demonstrate differences between sprayed and unsprayed plots from December 2012 to February 2013 for RCSN Kwinana East Port Zone trial locations.
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Manganese concentrations in soil and wheat crops were monitored over time in the field.