Written by Charlotte Cunningham
Over 60% of samples assessed by Bayer in December contained light leaf spot symptoms (3 days after incubation) according to the latest findings from the firm’s SpotCheck initiative. Charlotte Cunningham reports. Mild temperatures throughout the end of 2019 and no prolonged cold spell have resulted in a conducive environment for light leaf spot to develop, particularly latently within the crop, according to Bayer. This, coupled with more and more rainfall furthering the likelihood of new infections, has driven the incidence of light leaf spot symptoms in samples assessed by the SpotCheck initiative. According to Philip Walker, arable plant pathologist at ADAS, the high number of samples identified to contain light leaf spot confirms the suspicion that there was a lot of latent disease building in the crop. Looking ahead to the coming months he warns for farmers to be particularly careful if weather conditions continue to stay mild. “If there’s a significant drop in temperatures, we’re unlikely to see new infections, and any pre-existing infections will pause in development. However, if conditions remain mild then there will likely be more and more infection events in previously symptomless fields. “A crop carrying high levels of light leaf spot infection into stem…
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