How long would it take for Asian soybean rust to be transported by wind currents from southern to northern production areas?
Opinion varies on the time it will require for Asian soybean rust to reach its potential range after the initial introduction into the United States. It could take one season or several years. Research shows that wind patterns are more favorable for disease movement from south to north in El Nio years. Once Asian soybean rust reaches the United States, the spread of rust from south to north will be different each year and will depend on where the pathogen overwinters, the amount of inoculum that overwinters in the south each year, and the weather patterns in the spring. Most rust diseases move 2030 miles a day during a growing season.
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