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flag leaf

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Catalogue: GRDC Updates
The paper reports findings from field studies using radioactive tracers and desiccation treatments to estimate the relative contributions of plant components to grain yield in NSW... Tracer measurements at maturity showed that assimilates produced in all plant components after anthesis were equally present in the grain at maturity... The contribution of pre-anthesis stem reserves to grain yield was assessed by the reduction in WSC...
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Catalogue: GRDC Publications
Influence of fungicide rate (mean of fungicide products - four site mean) Stem rust control assessed over the four trial sites revealed that using high rates was essential for the control of the disease, even if the fungicide had been applied prophylactically (before infection was visible in the crop)... Influence of cultivar resistance and fungicide application (Prosaro ) on yield and stem rust severity measured on the flag sheath 18 days after fungicide application at early dough (GS82) and assessed at mid dough - physiological maturity (GS85-90) - Bairnsdale, Gippsland, Victoria, 2010... The yield potential for the crop with no nitrogen applied is estimated at GS30 from the results of numerous of trials conducted in that region where NDVI at GS30 is divided by the number of growing degree days (GDD) greater than 0 C since planting, referred to as the INSEY units (in season estimate of yield)...
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Catalogue: GRDC Updates (North)
The potential for epidemic development can be gauged by the amount of disease in the lower canopy... Cereal seed treatments are widely used throughout the Northern Grains Region (NGR) to control or suppress a broad range of diseases... With a range of diseases that are more difficult to control and a grain fill period less predisposed to drought stress there may be more benefit to strobilurins in barley crops rather than wheat, though more work is needed to verify this statement...
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Catalogue: GRDC Updates (South)
The potential for epidemic development can be gauged by the amount of disease in the lower canopy... Cereal seed treatments are widely used throughout the Northern Grains Region (NGR) to control or suppress a broad range of diseases... With a range of diseases that are more difficult to control and a grain fill period less predisposed to drought stress there may be more benefit to strobilurins in barley crops rather than wheat, though more work is needed to verify this statement...
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Catalogue: Ground Cover
Alan Bowring who is researching the role of head and flag leaf development in contributing to wheat yield... New research is suggesting lower leaves contribute more to wheat yield than is currently the "accepted norm" - under which protection of the flag leaf is the principal determinant of grain yield... In similar cool long season conditions in Australia this also seems to be the case in more difficult hot, dry seasons in northern Australia, Alan Bowring's results suggest that the importance of the flag leaf is about half of what is accepted in the UK. His data indicates that in these dry conditions the earlier leaves preceding the flag leaf (especially the preceding two; flag leaf -1 and -2) have a similar overall contribution to yield as the flag leaf, at least in environments such as northern NSW. Contribution to yield of pre-flowering stem reserves was assessed in the research and is believed to contribute between 16 and 21 per_cent by remobilisation of sugars and proteins to the grain...
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Catalogue: Ground Cover
Alan Bowring who is researching the role of head and flag leaf development in contributing to wheat yield... New research is suggesting lower leaves contribute more to wheat yield than is currently the "accepted norm" - under which protection of the flag leaf is the principal determinant of grain yield... In similar cool long season conditions in Australia this also seems to be the case in more difficult hot, dry seasons in northern Australia, Alan Bowring's results suggest that the importance of the flag leaf is about half of what is accepted in the UK. His data indicates that in these dry conditions the earlier leaves preceding the flag leaf (especially the preceding two; flag leaf -1 and -2) have a similar overall contribution to yield as the flag leaf, at least in environments such as northern NSW. Contribution to yield of pre-flowering stem reserves was assessed in the research and is believed to contribute between 16 and 21 per_cent by remobilisation of sugars and proteins to the grain...
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Catalogue: Ground Cover
The key period for protecting wheat against Septoria tritici blotch is from the start of stem elongation to the booting phase as the ear starts to emerge... Grain growers should be concentrating their first fungicide spray for Septoria tritici blotch (STB) at GS31 rather than waiting for the flag leaf to emerge before trying to get on top of the disease... Mr Poole says mutations similar to those that have made STB less sensitive (more resistant) to triazole fungicides in Europe have now been detected in Australia through work conducted by Dr Andrew Milgate, from the New South Wales Department of Primary Industries...
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Catalogue: GRDC Factsheets
Correct identification of the cause of plant symptoms is essential, and an understanding of the growth and spread of any pathogen will assist in any decision making... Cultivar resistance is the best protection against fungal diseases... identifying and understanding fungal disease Most diseases that affect cereals are caused by fungi...
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Catalogue: GRDC Factsheets
Correct identification of the cause of plant symptoms is essential, and an understanding of the growth and spread of any pathogen will assist in any decision making... Cultivar resistance is the best protection against fungal diseases... identifying and understanding fungal disease Most diseases that affect cereals are caused by fungi...
Related categories:
Catalogue: GRDC Factsheets
Correct identification of the cause of plant symptoms is essential, and an understanding of the growth and spread of any pathogen will assist in any decision making... Cultivar resistance is the best protection against fungal diseases... identifying and understanding fungal disease Most diseases that affect cereals are caused by fungi...
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