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scald

Catalogue: Ground Cover
The increasing prevalence of barley powdery mildew is being seen as a warning to growers, breeders and chemical companies to change their ways or face potential resistance issues... "Barley powdery mildew costs growers in WA about $39 million a year in lost yield, particularly in the medium to high-rainfall zones, which experience high humidity," Professor Oliver says... Using genetic testing, Professor Oliver's team has found mutations in the barley powdery mildew collected over the past three years that make it resistant to fungicides, including tebuconazole and propiconazole - the active ingredients in Folicur and Tilt respectively...
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Catalogue: GRDC Updates
Spot form of net blotch (SFNB) Earlier fungicide application may yield benefits.. 11 different fungicide programs were evaluated with three replicates of each program... Untreated test weight 60 kg/hL No significant difference in test weight from any fungicide but clear trend with all 11 fungicide programs recording higher test weight Average test weight benefit across all fungicide programs was 1 kg/hL Untreated and all fungicide programs only eligible for Feed 2 No difference between product or rate Even with late disease buildup, T1 and T2 timings provided similar test weight trends to T3 or where multiple application occurred..
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Catalogue: GRDC Updates
Spot form of net blotch ( Pyrenophora teres f maculata ) is a key disease of barley in the northern region... Plant breeding represents the most effective method of long term disease management together with an increase in rotation interval between barley crops... 11 different fungicide programs were evaluated with three replicates of each program...
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Catalogue: GRDC Updates
To date, almost 570 Fusarium isolates have been collected at 92 sites from sorghum stalks, seedlings, panicles (heads) and stubble of commercial crops, with just over 500 isolates identified to species... There were no significant differences in yield between treatments in any of the three trials, indicating that fusarium stalk rot did not cause yield loss in the absence of lodging after the "soft" finishes experienced in the trials... The use of desiccant herbicide to aid in harvesting should be carefully evaluated in paddocks where sorghum stalk-rotting pathogens have been found in the past...
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Catalogue: GRDC Updates
Barley production is estimated at 25,000 tonnes for 2012/13 with a state wide average of 3.13 t/ha (ABARES Crop Reports 2012)... The remaining three varieties Macquarie , Navigator and Westminster do have scope to be grown successfully in Tasmania due to improvements in grain yield potential, agronomic characteristics and superior disease ratings compared to Gairdner ... Mean hectolitre weight (kg/hl) performance for Macquarie , Navigator and Westminster A compared to Gairdner A from NVT South West Victoria (2008 - 2012)...
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Catalogue: GRDC Updates
Commander and Buloke remain the highest yielding malting varieties.. Table 1 includes grain yield results for seven varieties undergoing malting accreditation... Only data for varieties evaluated in all trials is included...
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Catalogue: GRDC Media
Growers warned of new leaf rust pathotype in WA.. An eastern Australian wheat leaf rust pathotype has been identified in four diverse regions across Western Australia (WA), reminding growers that long-distance movement of rust inoculum is a serious threat to crop health and hygiene... "Wyalkatchem may shift from R-MR to MS and Emu Rock from R to MS-S following further testing at the ACRCP. Some varieties have other leaf rust genes that are expected to still be effective so have a lesser rating shift- King Rock, Fortune and Zippy are likely to shift from R/MR to MRMS. Cultivars Carnamah and Cobra may also be vulnerable to the new pathotype but further tests are needed to establish their responses more accurately...
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Catalogue: GRDC Updates
Control inoculum levels and you control this disease.. If you only read this one sentence you will know a great deal of what there is to know in avoiding Yellow leaf spot (YLS) epidemics in the majority of seasons in SNSW, don't sow susceptible varieties into stubbles containing moderate to high levels of inoculum... Such as those described in Street and Brill (2012) in central NSW or Beard and Smith in Western Australia (2012) have demonstrated that a program of early and repeated spraying is required to minimise the potential losses of the disease in susceptible varieties...
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Catalogue: GRDC Updates
Control inoculum levels and you can control this disease.. If you only read this one sentence you will know a great deal of what there is to know in avoiding yellow leaf spot (YLS) epidemics in the majority of seasons in SNSW; don't sow susceptible varieties into stubbles containing moderate to high levels of inoculum... Such as those described in Street and Brill (2012) in central NSW or Beard and Smith in Western Australia (2012) have demonstrated that a program of early and repeated spraying is required to minimise the potential losses of the disease in susceptible varieties...
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Catalogue: GRDC Media
Foliar disease workshops prepare advisers for 2012 As grain growers plan their approach to season 2012, sound advice to help develop a proactive strategy to manage cereal foliar diseases is a must... Grains advisers can update their knowledge on control for a range of diseases, such as rust, yellow leaf spot, net blotch, scald, Stagonospora , Septoria and powdery mildew at a series of training courses to be held across Australia... How to manage the recent development of resistance in powdery mildew to triazole fungicides and the potential for resistance to occur in other disease/fungicide combinations is also an issue advisers need to be across."..
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