THE FIRST stem cankers and phoma stem lesions are now present on oilseed rape crops, according to a leading expert.
These will continue to appear and increase in severity up to harvest, advises ADAS pathologist Peter Gladders in the latest Crop Monitor update .
In wheat crops, difficulties with applying T1 sprays has led to very high disease pressure from Septoria, according to ADAS pathologist Bill Clarke‘s latest report.
Oilseed crops are mainly at the late flowering stage (GS 4,9), he reports, with most pods now set (GS 5,6-5,9).
Phoma leaf spot is still active at mid plant level and its incidence is still high in the south and east.
Light leaf spot has been much less important than usual this season and is only occasionally being reported on the upper leaves and stems.
Sclerotinia germination has been very high this year in the south and east and if problems are going to occur, plant infection will soon be evident.
New on the site an assessment of 100 commercially-grown winter barley crops at GS30.
Crop Monitor is a new, free service that uses live data from trial sites across the UK along with historical data to give growers an accurate picture of disease development in wheat and oilseed rape .
Funded by the Department for the Environment, Food and Rural Affairs and run by Central Science Laboratory, weekly updates are provided by ADAS pathologists and AICC agronomists.
The Crop Monitor website allows users to view data in graphs by region, variety, cultivar, leaf number or a combination of their choice.
The site also provides access to historical data from DEFRA-funded research and showcases new research developments.