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blackleg infection

Catalogue: NVT Online Papers
Choose a cultivar with adequate blackleg resistance for your region... For individual site results consult the NVTonline website... Background: Blackleg disease can be minimised by a number of factors including sowing cultivars with high blackleg resistance, avoiding sowing in close proximity to last year's stubble and applying fungicides (see the current Blackleg Management Guide for details www.grdc.com.au)...
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Catalogue: NVT Online Papers
Choose a cultivar with adequate blackleg resistance for your region... For individual site results consult the NVTonline website... Background: Blackleg disease can be minimised by a number of factors including sowing cultivars with high blackleg resistance, avoid sowing canola in close proximity to last year's stubble and applying fungicides (see the current Blackleg Management Guide for details - www.grdc.com.au)...
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Catalogue: GRDC Media
Assess blackleg risk to canola yields before spraying crops.. Assess blackleg risk to canola yields before spraying crops Canola growers in the southern cropping region must determine the potential for significant yield losses caused by blackleg infection before investing in and applying post-emergent treatments... Key points contained in the fact sheet include: "It is important for growers to monitor crops each season so they know the extent of blackleg infection and can make more informed management decisions," Dr Marcroft said...
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Catalogue: GRDC Media
Assess blackleg risk to canola yields before spraying crops Canola growers in the southern cropping region must determine the potential for significant yield losses caused by blackleg infection before investing in and applying post-emergent treatments... Growers need to be confident that they will incur significant yield losses before investing in this form of control," Dr Marcroft said. ".. Key points contained in the fact sheet include: "It is important for growers to monitor crops each season so they know the extent of blackleg infection and can make more informed management decisions," Dr Marcroft said...
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Catalogue: GRDC Media
Control blackleg early to minimise canola yield losses.. Department of Agriculture and Food (DAFWA) plant pathologist Ravjit Khangura, who conducts Grains Research and Development Corporation (GRDC) supported research in WA, said it was important to control blackleg early in the season to minimise yield losses... "Blackleg can attack the crop at any stage, but early seedling infections - especially up to the four or five-leaf stage - are the most damaging in terms of the development of severe stem cankers and yield loss," she said...
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Catalogue: Ground Cover
Small lesions at the leaf axil (where the stem of a leaf meets the branch) or long lesions the entire height of the plant... "In the past plants only had leaves during the main infection period in the winter, but now plants may have already begun elongation during the winter, so that the plants have stems and branches to be directly infected," Dr Marcroft says... GRDC-funded research undertaken in 2015 by Marcroft Grains Pathology in glasshouses showed that when plants were infected after elongation the upper-stem infections occurred, whereas when they were inoculated during the vegetative stage they developed 'traditional' crown canker but escaped the stem/branch infection...
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Catalogue: NVT Online Papers
The Lower Eyre Peninsula survey showed most paddocks had internal blackleg infection levels below 10% unlikely to suffer a yield or oil content penalty... Current varieties have a number of resistance genes if blackleg overcomes one resistance gene, other resistance genes remain effective and so the crops should not become completely susceptible... Final grain yield after slashing was similar in all varieties (about 0.8 t/ha average), except CB1206 (0.2 t/ha)...
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Catalogue: GRDC Media
Western Australia's coming cropping season is expected to be a high risk year for blackleg disease in canola but growers can take steps to minimise the damage... Department of Agriculture and Food (DAFWA) plant pathologist Ravjit Khangura said growers should select resistant varieties, not seed into or close to last year's canola stubble and, if warranted, use a fungicide seed dressing or fungicide-amended fertiliser... The National Brassica Pathology Working Group, of which she is a member, is concerned that growers will face the risk of crop failure due to blackleg if attempting to grow canola on canola...
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Catalogue: GRDC Factsheets
WESTERN, NORTHERN AND SOUTHERN REGIONS QUANTIFY THE RISK, PADDOCK BY PADDOCK Blackleg can cause severe yield loss, but can be successfully managed... If you have: high or increasing levels of blackleg in your crop (from monitoring disease levels each year); used the management practices outlined in Step 3; and sown cultivars from the same resistance group in close proximity (within 2km) for three or more years, then sow a cultivar from a different resistance group (see page 4 - Blackleg Resistance Groups)... To facilitate the process, all cultivars have been placed into groups (A to H) based on their resistance genes inTable 3...
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Catalogue: GRDC Factsheets
WESTERN, NORTHERN AND SOUTHERN REGIONS QUANTIFY THE RISK, PADDOCK BY PADDOCK Blackleg can cause severe yield loss, but can be successfully managed... If you have: high or increasing levels of blackleg in your crop (from monitoring disease levels each year); used the management practices outlined in Step 3; and sown cultivars from the same resistance group in close proximity (within 2km) for three or more years, then sow a cultivar from a different resistance group (see page 4 - Blackleg Resistance Groups)... To facilitate the process, all cultivars have been placed into groups (A to H) based on their resistance genes inTable 3...
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