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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
Leg-up for canola growers in minimising the risk of blackleg Growers are being equipped with an important tool in their quest to minimise the risk of blackleg - the most damaging disease of canola and juncea-canola in Australia... Industry experts and the Grains Research and Development Corporation (GRDC) have developed a Risk Assessor to help growers make the right choices prior to or at sowing this coming season in order to reduce the risk of blackleg... Growers are encouraged to use the Risk Assessor to determine if a paddock presents a high risk situation and what practices can be changed to reduce yield loss caused by blackleg...
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Catalogue: GRDC Media
Canola growers can reduce potential yield losses and the probability of blackleg disease resistance breakdown occurring by changing cultivars every three years... That's according to blackleg authority Steve Marcroft who says sowing the same cultivar every year is likely to break the cultivar's resistance to blackleg - the most severe disease of canola in Australia... Speaking at recent Grains Research and Development Corporation (GRDC) grains research Updates throughout the southern cropping region, Dr Marcroft has told growers and advisers that every year a cultivar is sown from the same resistance group, the number of virulent isolates that can attack that particular cultivar increases...
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Catalogue: GRDC Media
The Grains Research and Development Corporation (GRDC), with the support of industry authorities, local agronomists and farming groups, is advising lower EP growers to be aware of the risks of sowing the canola cultivar Hyola 50 due to high levels of blackleg infection in this cultivar within the lower EP region in 2011... Dr Marcroft says because Hyola 50 has been grown extensively on the lower EP, an even higher level of disease severity could occur this year if the cultivar's resistance is overcome by the blackleg fungus... In summary, the measures that should be taken include: 1/ Choose a canola cultivar with high levels of blackleg resistance for the Eyre Peninsula noting varieties with recent resistance changes (use only the current year's ratings)...
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Catalogue: GRDC Media
Author : Sharon Watt Oilseeds disease authority Dr Steve Marcroft says severe early blackleg disease infection in 2016 could be attributed to the combination of three factors - wet weather, breakdown of cultivar resistance and the onset of fungicide resistance... A combination of factors has led to severe early infection of blackleg disease in this year's canola crops in southern Australia (South Australia, Victoria and southern New South Wales)... "Normally with blackleg we tell farmers to monitor their crops at end of season to see how much stem canker they have - it's quite unusual for the disease to be striking young crops so severely at this time of the year," said Dr Marcroft, whose research is supported by the Grains Research and Development Corporation (GRDC)...
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Catalogue: GRDC Media
The National Brassica Pathology Working Group, comprising pathologists, agronomists, chemical companies and canola breeders from across Australia, unilaterally shared concern at a recent meeting in Melbourne that growers would potentially face serious risk of crop failure due to blackleg if attempting to grow canola on canola... Growers are urged not to risk the long-term viability of the canola industry by sowing canola on canola," said Dr Marcroft, on behalf of the National Brassica Pathology Working Group... Dr Marcroft, who has been addressing GRDC grains research Updates in the southern region about the blackleg scenario, says growers can use the Risk Assessor to determine if their paddocks are in a high risk situation, and what practices could be changed to reduce yield loss from blackleg. "..
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Catalogue: GRDC Media
Growers urged not to grow canola on canola to prevent disease risk and crop losses.. Growers are urged not to risk the long-term viability of the canola industry by sowing canola on canola," said Dr Marcroft, on behalf of the National Brassica Pathology Working Group... Dr Marcroft, who has been addressing GRDC grains research Updates in the southern region about the blackleg scenario, says growers can use the Risk Assessor to determine if their paddocks are in a high risk situation, and what practices could be changed to reduce yield loss from blackleg. "..
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Catalogue: GRDC Media
Canola growers can reduce potential yield losses and the probability of blackleg disease resistance breakdown occurring by changing cultivars every three years... That's according to blackleg authority Steve Marcroft who says sowing the same cultivar every year is likely to break the cultivar's resistance to blackleg - the most severe disease of canola in Australia... Speaking at recent Grains Research and Development Corporation (GRDC) grains research Updates throughout the southern cropping region, Dr Marcroft has told growers and advisers that every year a cultivar is sown from the same resistance group, the number of virulent isolates that can attack that particular cultivar increases...
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Catalogue: Ground Cover
Monitoring canola crops for blackleg and sclerotinia is essential for making informed decisions about managing these diseases.. The Blackleg Management Guide fact sheet available on the GRDC website describes how to monitor crops and lists all the management practices available.. Dr Lindbeck says foliar fungicides need to be considered in districts at high risk of disease development (areas where disease frequently occurs and where canola has a long flowering period and there is reliable spring rainfall)...
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