12 February 2016 | Online since 2003

Light leaf spot risk remains high according to forecast



27 March 2014 02:00:15|Arable,Cereal,Crops,News

Light leaf spot risk remains high, according to forecast


Risk of light leaf spot is high according to an updated forecast from Rothamsted Research. The latest forecast takes into account winter rainfall from December 2013 – February 2014 and shows that risk remains high in all regions and has increased in the south due to heavy rain over winter.
“Growers may need to be particularly vigilant this spring,” explained Dr Neal Evans of Weather INovations (WIN) who put together the forecast. “I suspect the model is underestimating the amount of disease we are seeing. Light leaf spot incidence on pods at harvest last year was low, although stem incidence at the time was moderate to high.”
Pod incidence is one of the key inputs for the forecast as a measure of disease carry over from one season to another. For future years, it may be possible to combine stem and pod incidence, to tweak the model. This and other aspects of light leaf spot are being looked into be Dr Evans and his colleagues as part of HGCA project RD-2013-3814 (Investigating components of the oilseed rape light leaf spot epidemic responsible for increased yield loss to the UK arable industry).
In addition to WIN and HGCA, the project involves scientists from SRUC, ADAS, Rothamsted Research and technical input from Bayer CropScience. Commenting on light leaf spot levels in the field this season, ADAS’s Dr Faye Ritchie said:
“We saw the first signs of the disease at a low level at the end of January. In some fields the disease remains at a low level but in other, perhaps less sheltered fields, the rain has certainly driven the epidemic along and we see patches of diseased plants where rain-splash has spread the disease from initial foci”.
Dr Jon West, Rothamsted Research added "We were quite surprised when we assessed our experimental field plots this past week. Some varieties had very little infection whilst others had severe infections and it’s the severity of the infection that has an impact on yield loss. Overall the level seems moderately high this season but there’s definitely a large varietal effect”.

Download





0 Comment


Name

Please enter your name


Email

Comment

Please enter your comment


Post Comment

Your comment submitted successfully.Please wait for admin approval.


Comments

No comments posted yet. Be the first to post a comment

World News

Greece | 12 February 2016
Government braces for farmers' descent on Athens

Hundreds of farmers from various parts of Greece are expected to descend on Athens on Friday to protest against planned increases to their tax and social security contributions but the government hope...


United Kingdom | 12 February 2016
Payments row Scottish government minister faces farmers

Scottish government rural affairs secretary Richard Lochhead is expected to face tough questions about payments to farmers later. The minister is due to address the NFU Scotland annual general meet...


Canada | 12 February 2016
Cage-free eggs have drawbacks says farm animal welfare expert

The push for cage-free eggs by fast food companies is not necessarily the best option, according to a farm animal welfare expert at the Atlantic Veterinary College. Michael Cockram at UPEI's Sir J...


France | 12 February 2016
France's Hollande says to cut farmers' payroll taxes

French President Francois Hollande said on Thursday that the government would reduce payroll taxes to help struggling farmers. Prime Minister Manuel Valls "will announce before February 17 a new de...


New Zealand | 12 February 2016
Sheep farmers look for answers to slow the decline

Sheep farmers can't seem to catch a break at the moment. Pat Deavoll delves deep into why sheep numbers have declined. The message is clear; the demise of sheep farming in South Canterbury reflects...



Trending Now

Viewed
Discussed

Farms and Land for sale


Holiday Rentals search



Top stories you may have missed
Username
Password