01 March 2015 | Online since 2003



28 July 2010|Produce,Crops,News

Red alert for brassica pests and disease


Brassica growers are facing high risks of pest and disease pressure this season. The Brassica Alert disease and pest forecasting system for brassica crop growers has already hit red warning high risk for the key diseases Alternaria, Ringspot and White Blister by mid-July, along with high risk for Silver Y and thrips.

The latest report (23 July 2010) - above - shows weather conditions have remained highly favourable to White Blister at every one of the monitored sites across Lincolnshire. The risk of Alternaria and Ringspot risk has eased, but Brassica Alert will continue to monitor the sites for disease spores of both diseases in the air which, combined with weather forecasts, will trigger the traffic-light style warning of disease risk.

With the current conditions White Blister will require treatment with an appropriate fungicide, such as Folio Gold, as soon as symptoms are seen, advises Andy Richardson of the Allium & Brassica Centre (above), which produces the Brassica Alert forecasts. "When the system triggers a high risk for Ringspot (below) and Alternaria, any crops that have not received a fungicide in the past 14 days must be treated as a priority."



For initial Ringspot or Alternaria control, Amistar Top combines a high level of triazole activity with difenoconazole, to target any infection already in the crop, along with the strobilurin protectant of azoxystrobin to prevent infection of clean green leaf. Where growers are seeking to hold strobilurin use for later in the season, they may opt for straight Plover (difenoconazole) for the early applications.



Mr Richardson reports that a high level of disease risk across the whole region early in the season will require growers take action now, to minimise the risk that diseases will continue to develop as the autumn progresses. "We have removed the ’amber’ medium risk warning for diseases on Brassica Alert, which highlights the issue that, if there is disease risk present, growers need to be taking mitigating action," he advises.

Compounding the high White Blister disease risk, key brassica pests, thrips and Silver Y Moth, have also been identified at red high risk numbers on every one of the monitoring sites, with Diamond Back Moth at the amber moderate risk level. That means over 150 thrips and 20 Silver Y Moths have been caught in each of the traps, along with 10-20 Diamond Back Moths.

Jon Ogborn of Syngenta urges growers to start insecticide strategies early, to prevent damage and any further check in crops already behind with the dry weather. "The Brassica Alert warnings are a timely indication to look out for the first signs of caterpillar damage," he warns. "Hallmark Zeon applications targeted for Silver Y Moth have proven extremely effective, and will control Diamond Back Moth caterpillars too." Hallmark Zeon treatment for caterpillars may also help suppress thrip numbers, which are of particular concern for storage cabbage producers.

Brassica Alert is sponsored by Syngenta and available free to all growers and agronomists, providing valuable guidance on local risks and helping to tailor application timing more accurately. Growers can receive warnings, based on traffic-light system of green, amber or red, from the website and can get high risk warning SMS text messages direct to their mobile phone.

Growers and agronomists covering a large area can opt to receive information from any number of sites across the region. Maintaining a record of risk levels can also help with justification of pest and disease treatments. To sign up free go to: http://www.syngenta-crop.co.uk/brassica-alert.aspx

Andy Richardson adds that, with better tailoring of fungicide programme timings, the system has proven extremely effective over the past four seasons. It has, on average, enabled growers to deliver higher yields of marketable produce using fewer treatments over the course of the season.


Download



Comments


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

To post comment without approval login or register

Display name

Please enter your name

Email (optional)
Comment

Please enter your comment

Post Comment

Your comment submitted successfully.Please wait for admin approval.

Some error on your process.Please try one more time.



Jobs


16 February 2015
Apprentice Sales Advisor
Apprenticeship frameworks we offer include Agriculture, Animal Care, Trees and Timber, Horticulture, Butchery, Business and A...

27 February 2015
e-Commerce Administrator
e-Commerce Administrator Minety, Wiltshire £16,000 - £19,000 This busy office requires a quick learner with an eye for detail...

11 February 2015
Engineering Shift Team Manager
A detailed knowledge of dairy principles and processes (Desirable). Engineering Shift Manager....

28 February 2015
Commis Chef - £15K - Award Winning Restaurant - Live-in
Daily deliveries from local fruit farms, small holdings and game estates, as well as foraged fungi and sea vegetables, all ar...

18 February 2015
Electrical mates
We need electricians, electrical mates, labourers ,carpenters and machine drivers to help build a large ground mounted solar ...




Top stories you may have missed
2 February 2015 | Arable
Is EU membership damaging UK farming?

Is EU membership damaging UK farming?

Membership of the EU is damaging the British farming industry, according to...


29 January 2015 | Machinery and Equipment
Drones 'rapidly changing' agriculture

Drones 'rapidly changing' agriculture

BASIS has launched an accreditation for pilots of Unmanned Aerial Systems (...


23 January 2015 | Arable
UK wheat yields have potential to double

UK wheat yields have potential to double

UK wheat yields have theoretical potential to more than double over the nex...


23 January 2015 | Machinery and Equipment
Crowds flock to LAMMA 2015

Crowds flock to LAMMA 2015

Britain’s farmers flocked to Peterborough for the first day of LAMMA’15 to ...


22 January 2015 | Cattle
Don't blame supermarkets for milk crisis...

Don't blame supermarkets for milk crisis...

The crisis in the dairy industry is not the fault of supermarkets, accordin...


16 January 2015 | CLA
Families affected by HS2 face 'major wor...

Families affected by HS2 face 'major wor...

Transport Minister Baroness Kramer visited three rural businesses in Cheshi...


16 January 2015 | Machinery and Equipment
John Deere unveil new 6R tractor range

John Deere unveil new 6R tractor range

Spearheading the John Deere range of mid-size tractors from Mannheim, the n...


14 January 2015 | Animal Health
Monthly TB checks more effective than ba...

Monthly TB checks more effective than ba...

Regular testing for bovine TB could significantly reduce the number of infe...


12 January 2015 | News
Government regulations hampering UK agri...

Government regulations hampering UK agri...

Single-issue policy-making threatens to hamper, not help, the progress of U...


8 January 2015 | Cattle
2015: The year ahead for the beef market

2015: The year ahead for the beef market

2014 has been a “rocky old year” for the beef industry but better prices ar...