What is the developmental cycle of soybean rust?
Spores are disseminated by wind currents and land on leaves. If environmental conditions are favorable, the spores germinate and directly penetrate the plant tissue. Within 6-7 days a pustule begins to develop and urediniospores begin forming and are released in 2-3 days. Pustules can discharge spores for 2-3 weeks thus rapidly spreading this disease to other plants within a field or to distant soybean fields depending upon wind currents.
