In the last two seasons, soybean rust has shown limited dispersal during each growing season in the southern United States. During the summer months, it mainly spread in the Gulf Coast states. Near the end of the growing season, the disease took off and was found in many states, including three new states, Illinois, Indiana, and Virginia. Dry weather conditions the past two summers have been considered as a major reason for the slow development of this disease in the growing season.
Iowa State University
Yang, Xiao-Bing; Dias, Ana Paula; and Li, Xun, "Soybean rust: A research update" (2007). Integrated Crop Management News. 1144.
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