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pre emergent herbicides

Catalogue: Ground Cover
Feathertop Rhodes grass has a short seed life, so focused control measures over two years could bring the weed in check... Pre-emergent herbicides have a role to play as part of an integrated weed management (IWM) strategy to control feathertop Rhodes grass (FTR), but they are not a standalone solution... While residual herbicides are far from the solution, Mr Daniel says, they are one of the critical tools in controlling a range of weed species, including FTR...
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Catalogue: GRDC Factsheets
The use of Group A herbicides in fallow to control grass weeds such as the Chloris species - feathertop Rhodes grass (Chloris virgata) and windmill grass (Chloris truncata) - have shown to be a viable option for controlling young weeds... Recent research has investigated the use of some of these herbicides for fallow applications to control grass weeds, in particular the Chloris species - feathertop Rhodes grass (Chloris virgata) and windmill grass (C. truncata)... Trial results have shown that a minimum period of 5 to 7 days should occur between applications...
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Catalogue: GRDC Factsheets
A tactic that has rapidly increased in recent seasons is the use of pre-emergent herbicides, especially in the summer crop and fallow... The presence of stubble or existing vegetation can intercept herbicide before it reaches the soil surface... In a zero till system, it is most likely that allow for weeds to germinate at depth and effect on the binding ability of herbicides the pre-emergent herbicide will need to grow through the herbicide band on the (adsorption)...
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Catalogue: GRDC Media
Ineffective performance of pre-emergent herbicides due to a large range of factors can often result in weeds escaping control, replenishing the weed seed bank for years to come... Developed for the GRDC by consultants Mark Congreve and John Cameron from ICAN (Independent Consultants Australia Network), the manual covers a broad range of information needed to optimise and understand results from pre-emergent herbicides... Issues covered include stubble and crop interception; loss pathways such as photo degradation and volatilisation; the position of the herbicide in the soil; the influence of soil texture and cation exchange capacity; solubility; binding to clay and organic matter; the influence of soil moisture; half-life and breakdown mechanisms and impacts on crop rotation...
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Catalogue: GRDC Media
Ineffective performance of pre-emergent herbicides due to a large range of factors can often result in weeds escaping control, replenishing the weed seed bank for years to come... Developed for the GRDC by consultants Mark Congreve and John Cameron from ICAN (Independent Consultants Australia Network), the manual covers a broad range of information needed to optimise and understand results from pre-emergent herbicides... Issues covered include stubble and crop interception; loss pathways such as photo degradation and volatilisation; the position of the herbicide in the soil; the influence of soil texture and cation exchange capacity; solubility; binding to clay and organic matter; the influence of soil moisture; half-life and breakdown mechanisms and impacts on crop rotation...
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Catalogue: GRDC Updates
We have been conducting a series of trials to determine the ability of various pre-emergent herbicides to control brome... Trials have been conducted at various sites in SA and Victoria and on both species of brome... Brome was sprayed at 0 (T-0), 3 (T-3), 5 (T-5), 7 (T-7), 10 (T-10), 12 (T12) and 14 (T-14) days after sowing...
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Catalogue: GRDC Media
New manual offers advisers a wealth of herbicide knowledge.. "The manual does not replace the labels, but assists advisers in interpreting how the pre-emergent herbicides are likely to perform and to understand why they have performed as they have in specific situations," Mr Congreve said... Caption: ICAN senior consultant Mark Congreve says the new manual will assist advisers in interpreting how the pre-emergent herbicides are likely to perform...
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Catalogue: GRDC Media
New manual offers advisers a wealth of herbicide knowledge.. "The manual does not replace the labels, but assists advisers in interpreting how the pre-emergent herbicides are likely to perform and to understand why they have performed as they have in specific situations," Mr Congreve said... Caption: ICAN senior consultant Mark Congreve says the new manual will assist advisers in interpreting how the pre-emergent herbicides are likely to perform...
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Catalogue: GRDC Media
Caption : Wheat struggling to emerge at Mullewa when sown deeper than 100mm... "One of the research findings was that wheat crop emergence from deep sowing improved when large seed was used, as seed size affects the length of the coleoptile - which covers the emerging shoot," Dr French said... "At Buntine, seed size did not affect crop emergence and yields when wheat was sown at 40mm, but small wheat seed reduced yields by an average of 12 per cent when sown deep at 75mm...
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Catalogue: GRDC Media
Caption : Wheat struggling to emerge at Mullewa when sown deeper than 100mm... "One of the research findings was that wheat crop emergence from deep sowing improved when large seed was used, as seed size affects the length of the coleoptile - which covers the emerging shoot," Dr French said... "At Buntine, seed size did not affect crop emergence and yields when wheat was sown at 40mm, but small wheat seed reduced yields by an average of 12 per cent when sown deep at 75mm...
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