Climatic and Environmental Trends Observed During Epidemic and Non-epidemic Years of Soybean Sudden Death Syndrome in Iowa

Fig. 5. Soil temperature in April and May in years with high SDS prevalence (left) and years with low SDS prevalence (right). Soil temperature was calculated as the mean of soil temperatures in Ames and Crawfordsville, IA. The dashed line shows the 10-year mean based on years 2000-2009 and the solid line shows temperature for that year. The arrows show time when approximately 10% (dashed arrow) and 50% (solid arrow) of soybean planting had been completed in Iowa. Data for 2011 not shown.



Image from Plant Health Progress article:
Climatic and Environmental Trends Observed During Epidemic and Non-epidemic Years of Soybean Sudden Death Syndrome in Iowa