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Catalogue: GRDC Factsheets
Stem rust is characterised by reddish-brown, powdery, oblong pustules that can affect all plant parts... KeY POINts seasonal conditions are the key factors driving outbreaks of stem rust... Background When conditions favour a stem rust epidemic, it can be a very damaging disease that can cause complete crop loss in susceptible wheat varieties...
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Catalogue: GRDC Factsheets
Stem rust is characterised by reddish-brown, powdery, oblong pustules that can affect all plant parts... KeY POINts seasonal conditions are the key factors driving outbreaks of stem rust... Background When conditions favour a stem rust epidemic, it can be a very damaging disease that can cause complete crop loss in susceptible wheat varieties...
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Catalogue: GRDC Factsheets
Stem rust is characterised by reddish-brown, powdery, oblong pustules that can affect all plant parts... KeY POINts seasonal conditions are the key factors driving outbreaks of stem rust... Background When conditions favour a stem rust epidemic, it can be a very damaging disease that can cause complete crop loss in susceptible wheat varieties...
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Catalogue: Ground Cover
Stem fly can exist in a crop almost undetected and cause sizeable crop losses if not identified early... At the permitted 800mL/ha rate, dimethoate also kills natural predators of stem fly, resulting in a flare-up of other pests such as silverleaf whitefly, mites and Helicoverpa, Mr Brier says... Mr Brier says the "go soft early" IPM strategy should be used to conserve parasites of stem fly by avoiding non-selective 'hard' pesticides for as long as possible, especially synthetic pyrethroids (for example deltamethrin), organophosphates (for example dimethoate) and carbamates (for example methomyl and thiodicarb)...
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Catalogue: NVT Online Papers
Average percentage of site mean across all Australian Roundup Ready NVT sites with growing season rainfall <250mm 140 120.. + refers to maximum yield and - refers to minimum yield... Stages of stem elongation are defined according to how many detectable internodes (minimum length 5-10 mm) are found on the stem...
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Catalogue: Ground Cover
Stem fly can exist in a crop almost undetected and cause sizeable crop losses if not identified early... At the permitted 800mL/ha rate, dimethoate also kills natural predators of stem fly, resulting in a flare-up of other pests such as silverleaf whitefly, mites and Helicoverpa, Mr Brier says... Mr Brier says the "go soft early" IPM strategy should be used to conserve parasites of stem fly by avoiding non-selective 'hard' pesticides for as long as possible, especially synthetic pyrethroids (for example deltamethrin), organophosphates (for example dimethoate) and carbamates (for example methomyl and thiodicarb)...
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Catalogue: GRDC Factsheets
Choose resistant varieties to ward off stem rust.. While fungicides may work on leaf rust and stripe rust, which affect the leaves more than the stems, they are less effective on stem rust, especially in thick canopies where they may have trouble penetrating and contacting the stems... Figure 3: Stem rust appears on both the leaves and stems of the plant running parallel to the long axis of the leaf or stem...
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Catalogue: GRDC Factsheets
Choose resistant varieties to ward off stem rust.. While fungicides may work on leaf rust and stripe rust, which affect the leaves more than the stems, they are less effective on stem rust, especially in thick canopies where they may have trouble penetrating and contacting the stems... Figure 3: Stem rust appears on both the leaves and stems of the plant running parallel to the long axis of the leaf or stem...
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Catalogue: NVT Online Papers
Regional outbreaks are more common, causing losses over limited areas... Stem rust typically causes losses of 10-50 per cent, but this can increase to up to 90 per cent when it occurs in early spring and is not controlled... Stem rust requires living plants on which to grow and reproduce, so to infect crops during the season it must survive over summer by infecting volunteer cereals or grass hosts, known as the 'green bridge'...
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Catalogue: GRDC Final Reports
Cycle 2 F2 progeny were assessed for black spot resistance and stem strength in the winter of 2004, together with Cycle 2 parents and the original parents in a black spot nursery to measure the effectiveness of recurrent selection over two cycles... Heritability for both traits was moderate, with broadsense heritability measured at 43% for leaf disease and 39% for stem strength... Of six varieties evaluated in this study, there was significant variation among varieties in stem strength - as measured by force and flexion - and significant variation among varieties in diameter and compressed stem thickness...
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