Disease and weather
View Larger
Red thread caused by Laetisaria fuciformis, dollar spot caused by Sclerotinia homeocarpa and brown ring patch caused by Waitea circinata var. circinata were all active by the 29th of February, 2008 in San Diego, CA. Threat temperature is the running 5 day mean of the average daily air temperature. The horizontal orange line represents the threat temperature of 60F (15.5C) which appears to have triggered these 3 diseases.
