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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...
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Catalogue: GRDC Final Reports
Hybridity of putative hybrid plantlets was confirmed at the DNA level using published Simple Sequence Repeat (SSR) markers... (a) Shoots were regenerated from very immature ovule cultures of the wide cross between chickpea (ICCV 10) X C. bijugum (ILWC 260), which were rescued in vitro to avoid abortion from the mother plant... (b) The hybridity of such hybrids was confirmed on the basis of DNA polymorphism...
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Catalogue: GRDC Updates
Take home message Lodging creates a major challenge for plant breeders because of the trade off between lodging resistance and grain yield potential... The stay-green trait can have a significant effect in reducing the occurrence of lodging... The importance of pathogens on lodging and any build-up that may occur under continuous sorghum cultivation is unclear and needs more research...
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Catalogue: GRDC Updates
The hybrids only had low to moderate levels of stay-green... When grain moisture is 20 % or less, spraying with glyphosate at the higher label rates should be effective in killing the plant and usually allow for harvest to begin within 10 to 14 days... Lower stay green hybrids sprayed out at the pre 90% black layer with glyphosate may desiccate and harvest a couple of days earlier it is important to note that premature lodging may be induced in this situation within 14 days ...
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Catalogue: GRDC Final Reports
Drought resistant hybrids for Central Queensland (CQ), Darling Downs and north-west New South Wales (NW NSW) will consolidate maize production... Five inbreds with good resistance to polysora rust and high yield potential were released, and these materials are now being evaluated by seed companies... The season, 30 elite materials were evaluated across South Burnet, Central Queensland (herbicide residue resulted in poor stand establishment the trial was not harvested) and Darling Downs...
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Catalogue: GRDC Updates
The paper outlines results of past (latE 1980's) and recent research (>2000) as an overview of our current knowledge on plant populations and hybrid performance specific to irrigated systems in the northern grains region... The research conducted by Tony Dale in two consecutive seasons (1987-89) under full irrigation displayed a flat response to increases in population under 91 cm row spacing's... The effect of varying plant population on grain quality parameters was only assessed in the Bowenville, Qld trial...
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Catalogue: GRDC Final Reports
While sorghum hybrids with varying levels of resistance are continuing to emerge in the marketplace, there is an expectation by industry that the scheme should continue to provide midge resistance ratings for these hybrids... The requirement has been recognised by each of the commercial seed companies which have agreed to continue funding of the scheme; DAFF, which supports the scheme with staff, facilities and in-kind contributions required to undertake testing, as well as GRDC, which is continuing funding of the scheme at least until 2014... We gave a presentation at the annual Australian Sorghum Research Group meeting (AusSORGM) at Cedar Creek in 2010...
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Catalogue: Broadacre Field Crops DAFF QLD
The choice of variety will depend on market requirements, environmental conditions, whether the crop is irrigated and the level of disease resistance required... Growers aiming for maximum yields should consider a mid to full season maturity hybrid... A good husk cover (including tip cover) can be important if insects, disease, and pre-harvest rain are likely to pose threats...
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Catalogue: Broadacre Field Crops DAFF QLD
The choice of variety will depend on market requirements, environmental conditions, whether the crop is irrigated and the level of disease resistance required... Growers aiming for maximum yields should consider a mid to full season maturity hybrid... A good husk cover (including tip cover) can be important if insects, disease, and pre-harvest rain are likely to pose threats...
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