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disease pressure

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Catalogue: GRDC Media
Watch a video with FAR Australia's Nick Poole... Rust has taken a back seat as the primary disease for wheat in the high rainfall zone (HRZ) of south-eastern Australia with Septoria Tritici Blotch (STB) taking the reins as the biggest headache for growers over the last three seasons... "It has a much longer latent period (time between fungal spores infecting the crop and symptoms appearing), meaning you can't tell whether new tissue is infected since it takes longer for the disease to reveal itself in the crop," Mr Poole said. "..
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Catalogue: GRDC Media
Watch a video with FAR Australia's Nick Poole... Rust has taken a back seat as the primary disease for wheat in the high rainfall zone (HRZ) of south-eastern Australia with Septoria Tritici Blotch (STB) taking the reins as the biggest headache for growers over the last three seasons... "It has a much longer latent period (time between fungal spores infecting the crop and symptoms appearing), meaning you can't tell whether new tissue is infected since it takes longer for the disease to reveal itself in the crop," Mr Poole said. "..
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Catalogue: GRDC Media
HRZ growers urged to be prepared for STB threat.. Mr Poole says rusts are a "puppy" compared to STB because fungicides do not achieve the same level of control as seen with stripe rust in Australia, and because the disease has a longer latent period which makes it more difficult to determine its progress... With the STB pathogen becoming resistant to strobilurins and triazoles in other parts of world and with evidence that the pathogen in southern Australia has some of the early stage resistance mutations to triazoles, Mr Poole is urging growers to use an IDM strategy and not base control on fungicides alone...
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Catalogue: GRDC Media
Mr Poole says rusts are a "puppy" compared to STB because fungicides do not achieve the same level of control as seen with stripe rust in Australia, and because the disease has a longer latent period which makes it more difficult to determine its progress... With the STB pathogen becoming resistant to strobilurins and triazoles in other parts of world and with evidence that the pathogen in southern Australia has some of the early stage resistance mutations to triazoles, Mr Poole is urging growers to use an IDM strategy and not base control on fungicides alone... "In looking at fungicide options, bear in mind the recent discovery by Dr Andrew Milgate at New South Wales Department of Primary Industries of strains of the disease that show mutations conferring reduced sensitivity (low level resistance) to a number of triazole fungicides," Mr Poole said...
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Catalogue: GRDC Updates (North)
Optimising herbicide use - know your products and how they work.. Quirindi Grains Research Update 22 ndFebruary, 2006 100 80 60 ) 40 % 20 ( y0 t 0 i 0 10 200 300 0 100 200 300 r e Bravo-Quadris Folicur v e100 s e 80 s a 60 e s 40 i D 20 0 0 100 200 300 0 100 200 300 Headline Quadris Volume (L/ha) Ascochyta disease severity on Yuma (fern leaf type - Kabuli) with four fungicides and three carrier volumes @ 2.75 bar... In summary The work we have undertaken over the past five years conforms to the UK/Western European production systems when grown under irrigated conditions in Australia...
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Catalogue: GRDC Updates (South)
Optimising herbicide use - know your products and how they work.. Quirindi Grains Research Update 22 ndFebruary, 2006 100 80 60 ) 40 % 20 ( y0 t 0 i 0 100 200 3 0 0 100 200 300 r e Bravo-Quadris Folicur v e100 s e 80 s a 60 e s 40 i D 20 0 0 100 200 300 0 100 200 300 Headline Quadris Volume (L/ha) Ascochyta disease severity on Yuma (fern leaf type - Kabuli) with four fungicides and three carrier volumes @ 2.75 bar... In summary The work we have undertaken over the past five years conforms to the UK/Western European production systems when grown under irrigated conditions in Australia...
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Catalogue: GRDC Media
SARDI Cereal Pathologist Dr Hugh Wallwork has received reports of stripe rust and leaf rust in wheat, and net form net blotch and spot form net blotch in barley... While similar, the symptoms of stripe rust will appear in a line (top), whereas leaf rust appears as single pustules or more random groups of pustules (bottom)... The complication is that while Mace is not as susceptible to leaf rust, the disease has been seen in Mace, so it's not just a matter of any rust on Mace wheat being stripe rust."..
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Catalogue: GRDC Media
Pre-planting strategies to minimise blackleg risk.. Dr Steve Marcroft says fungicide tolerant blackleg isolates can cause stem canker and potentially yield loss... If crop monitoring in the previous year showed signs of blackleg and yield loss, Dr Marcroft says growers should look at their canola varieties' blackleg rating and consider how close they sow their canola to the previous year's stubble...
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Catalogue: GRDC Media
Pre-planting strategies to minimise blackleg risk.. Dr Steve Marcroft says fungicide tolerant blackleg isolates can cause stem canker and potentially yield loss... If crop monitoring in the previous year showed signs of blackleg and yield loss, Dr Marcroft says growers should look at their canola varieties' blackleg rating and consider how close they sow their canola to the previous year's stubble...
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Catalogue: GRDC Factsheets
" yellow spot fact sheet September 2011 westerN regION Management to reduce the risk of yellow spot A break from wheat-on-wheat, stubble management and growing resistant varieties are important risk-reducing practices for the stubble-borne disease yellow leaf spot... r A K n A H s A H s i n A M : o t o H p Yellow spot causes tan-coloured lesions on the leaves that are surrounded by yellow halos... www.grdc.com.au Table 1 Examples of yellow spot resistance ratings in wheat varieties grown in the western region Variety Disease rating AGT Katana A MS AGT Scythe A MS-S Annuello A MS-S Arrino MS AxeA VS Binnu A S Blade MS Bolac A S-VS Braewood A S Bullaring A S-VS Bumper A MR-MS Cadoux S-VS Calingiri MS CammA S-VS Carinya A S Carnarmah MR-MS Cascades MS Catalina A MS-S Clearfield JNZ A MS-S Clearfield STL A MS-S Correll A S-VS Datatine S-VS Derrimut A S-VS EGA 2248A S-VS EGA Bonnie Rock A MR-MS EGA Bounty A MR-MS EGA Eagle Rock A S EGA Gregory A S EGA Jitarning A S-VS EGA Wentworth A S-VS Ellison A MR Endure A S-VS Eradu S EspadaA MS-S Estoc A Sp FangA MS Fortune A MS-S Frame S-VS GBA RubyA MR GBA Sapphire A S-VS Gladius A MS H45A MR H46A MR Halberd S Jandaroi A MR-MS Janz VS Kalannie S-VS King Rock A MR-MS Kunjin A..
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