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sorghum ergot

Catalogue: GRDC Updates (South)
Crops should be inspected for ergot 10-14 days after flowering during cool, wet weather Concentrate on crop edges Estimate infection levels of approximately 100 heads (a level of <1% infected spikelet should be safe) Spray out plants if late tillers are infected Increase fan speed of headers to maximise sclerote removal during harvesting Harvest heavily contaminated areas of the crop separately 18.. Preliminary calculations suggest that for mirids, sweep net counts can be converted to beat cloth equivalents per square metre by dividing them by 2.2, provided the following protocols are used: Take 20 sweeps in 20 metres, with each sweep passing through one (1) metre of crop... It is essential that we start thinking about heliothis management in a farming systems context, looking closely at managing populations in all crops during the year...
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Catalogue: Broadacre Field Crops DAFF QLD
Honeydew oozing on a grain sorghum head caused by Claviceps africana (ergot)... Crops at greatest risk are: forage sorghums heads on ratoon crops flowering late in the season tillers on late-flowering plants crops in which pollination has been affected by a cold snap before or at flowering... To minimise the risk of ergot contamination, growers should: sow at recommended times ensure even flowering (use press wheels, high-germination seed, accurate seed depth control; good crop nutrition, wide row spacing (90-100 cm), especially with hybrids that tiller heavily, and consider pre-harvest kill-off of tillers using glyphosate herbicide) graze forage sorghum heavily to delay flowering until after grain sorghum has flowered...
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Catalogue: Broadacre Field Crops DAFF QLD
Honeydew oozing on a grain sorghum head caused by Claviceps africana (ergot)... Crops at greatest risk are: forage sorghums heads on ratoon crops flowering late in the season tillers on late-flowering plants crops in which pollination has been affected by a cold snap before or at flowering... To minimise the risk of ergot contamination, growers should: sow at recommended times ensure even flowering (use press wheels, high-germination seed, accurate seed depth control; good crop nutrition, wide row spacing (90-100 cm), especially with hybrids that tiller heavily, and consider pre-harvest kill-off of tillers using glyphosate herbicide) graze forage sorghum heavily to delay flowering until after grain sorghum has flowered...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Honeydew oozing on a grain sorghum head caused by Claviceps africana (ergot)... Crops at greatest risk are: forage sorghums heads on ratoon crops flowering late in the season tillers on late-flowering plants crops in which pollination has been affected by a cold snap before or at flowering... To minimise the risk of ergot contamination, growers should: sow at recommended times ensure even flowering (use press wheels, high-germination seed, accurate seed depth control; good crop nutrition, wide row spacing (90-100 cm), especially with hybrids that tiller heavily, and consider pre-harvest kill-off of tillers using glyphosate herbicide) graze forage sorghum heavily to delay flowering until after grain sorghum has flowered...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Crops planted after the end of January in southern Queensland and mid-February in Central Queensland run an increased risk of ergot infection, an airborne fungal disease that is favoured by cool wet conditions during flowering... Management relies on good agronomic practices... If planting outside the recommended window, growers need to aim for an evenly flowering crop to ensure that there are large quantities of highly viable pollen during flowering, because flowers that are fertilised by pollen are resistant to infection by the ergot spores...
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Catalogue: Broadacre Field Crops DAFF QLD
Crops planted after the end of January in southern Queensland and mid-February in Central Queensland run an increased risk of ergot infection, an airborne fungal disease that is favoured by cool wet conditions during flowering... Management relies on good agronomic practices... If planting outside the recommended window, growers need to aim for an evenly flowering crop to ensure that there are large quantities of highly viable pollen during flowering, because flowers that are fertilised by pollen are resistant to infection by the ergot spores...
Related categories:

Catalogue: Broadacre Field Crops DAFF QLD
Crops planted after the end of January in southern Queensland and mid-February in Central Queensland run an increased risk of ergot infection, an airborne fungal disease that is favoured by cool wet conditions during flowering... Management relies on good agronomic practices... If planting outside the recommended window, growers need to aim for an evenly flowering crop to ensure that there are large quantities of highly viable pollen during flowering, because flowers that are fertilised by pollen are resistant to infection by the ergot spores...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
" Print the page Marketing and use of mould-affected grain often presents a dilemma for growers and livestock producers, and usually comes down to how much the grain should be discounted... The first group is ergot alkaloids, produced by sorghum ergot growing prior to harvest, and the second is aflatoxins, which are mainly produced if sorghum is stored with high moisture content... The results in: shrunken and pinched grain, following drought or from soil fertility constraints discoloured grain, often covered with black, gray, pink or orange fungal growth (mould), after extensive warm, humid periods during grain maturation premature germination of the grain caused by wet or humid weather conditions at harvest, resulting in sprung, shot or sprouted grain...
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Catalogue: Broadacre Field Crops DAFF QLD
" Print the page Marketing and use of mould-affected grain often presents a dilemma for growers and livestock producers, and usually comes down to how much the grain should be discounted... The first group is ergot alkaloids, produced by sorghum ergot growing prior to harvest, and the second is aflatoxins, which are mainly produced if sorghum is stored with high moisture content... The results in: shrunken and pinched grain, following drought or from soil fertility constraints discoloured grain, often covered with black, gray, pink or orange fungal growth (mould), after extensive warm, humid periods during grain maturation premature germination of the grain caused by wet or humid weather conditions at harvest, resulting in sprung, shot or sprouted grain...
Related categories:

Catalogue: Broadacre Field Crops DAFF QLD
" Print the page Marketing and use of mould-affected grain often presents a dilemma for growers and livestock producers, and usually comes down to how much the grain should be discounted... The first group is ergot alkaloids, produced by sorghum ergot growing prior to harvest, and the second is aflatoxins, which are mainly produced if sorghum is stored with high moisture content... The results in: shrunken and pinched grain, following drought or from soil fertility constraints discoloured grain, often covered with black, gray, pink or orange fungal growth (mould), after extensive warm, humid periods during grain maturation premature germination of the grain caused by wet or humid weather conditions at harvest, resulting in sprung, shot or sprouted grain...
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