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susceptible wheat variety

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Catalogue: GRDC Media
Growers need strategy to manage yellow leaf spot.. If the infection is left untreated, a susceptible wheat variety may measure yield losses of up to 65 per cent, Mr Platz said... Fungicide success will be directly related to application number and timeliness, Mr Platz said, with maximum yield and quality benefits obtained by keeping the upper leaves free from disease during grain fill. "..
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Catalogue: GRDC Media
Western Australian growers with wheat crops susceptible to stem rust should be vigilant in checking crops and spray them early if they find the damaging disease... Grains Research and Development Corporation (GRDC) supported fungicide trials conducted by the Department of Agriculture and Food (DAFWA) have highlighted the importance of responding early to wheat stem rust in susceptible varieties to minimise losses in yield and grain quality... " the strategy, when applied in trials in the high yielding environment of Gibson in the Esperance region, provided yields 56 per_cent greater than the unsprayed crop, and economic returns of $399 per hectare - compared with $83/ha from a single fungicide application at the first sign of the disease, and $111/ha for a single spray three weeks after the disease became evident," Dr Jayasena said...
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Catalogue: GRDC Factsheets
Stripe rust: the first rust to appear in the cropping cycle.. The approach will also ensure the control of leaf rust and stem rust... As humidity declines, the spores disperse separately and can travel greater distances, resulting in rust infection being more uniform across the crop...
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Catalogue: GRDC Media
With winter crop sowing well underway across New South Wales, wheat growers are being reminded to stay vigilant on stripe rust... NSW Department of Primary Industries (DPI) senior plant pathologist Dr Steven Simpfendorfer has two key messages for growers as the season progresses - monitor crops regularly for any signs of rust infection and tailor fungicide strategies to varietal resistance level, rainfall zone, growth stage and seasonal conditions... Speaking at the Grains Research and Development Corporation (GRDC) Grains Research Updates earlier this year, Dr Simpfendorfer said the stripe rust risk was always present and urged growers not to drop the ball on management, particularly around minimum disease standards...
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Catalogue: GRDC Factsheets
Stripe rust: the first rust to appear in the cropping cycle.. The approach will also ensure the control of leaf rust and stem rust... As humidity declines, the spores disperse separately and can travel greater distances, resulting in rust infection being more uniform across the crop...
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Catalogue: GRDC Updates (West)
Controlling leaf spot diseases - yellow spot and stagonospora (septoria) nodorum - in wheat-onwheat cropping 1... Early spraying can reduce le;af spot diseases when susceptible varieties are sow; n on wheat stubble.. Where early disease is severe and developing rapidly on susceptible variety & seasonal conditions favour disease development Application at tillering or stem extension delays disease development and increases yield Z31 application most reliable timing for profitability May need additional application at flag leaf emergence..
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Catalogue: GRDC Updates (West)
P4/S9 and P2/S4 were the two most profitable sequences and, overall, the 'maximum profit - P4' philosophy had the highest mean gross margin... It is logical that those growers that have chosen to have no livestock will have no interest in trialling grazing crops... Overall, the data has indicated that for the biserrula inoculant all of the carrier's have difficulties in carrying enough live rhizobia numbers to adequately nodulate the legume hosts after 3-4 months of dry, hot soil...
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Catalogue: GRDC Factsheets
Changes in Septoria tritici blotch resistance to fungicides have been detected in the southern grain growing region, especially where wheat is sown into wheat stubble... Two gene mutations in STB detected by NSW Department of Primary Industries indicate resistance to some fungicides (see Case Study)... Currently none of the products with an azole/strobilurin combination in Australia used on wheat are registered for use on STB...
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Catalogue: GRDC Factsheets
Changes in Septoria tritici blotch resistance to fungicides have been detected in the southern grain growing region, especially where wheat is sown into wheat stubble... Two gene mutations in STB detected by nSw department of Primary industries indicate resistance to some fungicides (see Case Study)... CASE STUDy: Managing STB resistance to fungicides increasing resistance of STB to some azole fungicides has been detected in Australia...
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Catalogue: GRDC Updates
Sowing a susceptible wheat variety on stubble of a previously infected susceptible variety (e.g. Gregory-on-Gregory) represents a much higher risk for developing high levels of yellow spot... The incidence and severity of yellow spot increases as moisture periods lengthen such that it takes repeated rain events to drive the disease from the lower to the upper canopy later in the season... Yellow spot is generally considered a significant disease in very wet seasons (e.g. 1998 and 2010) where yield losses of up to 30% have been recorded in susceptible wheat varieties...
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