New problems do develop occasionally. In recent years, three problems were originally misidentified. Dectes stem borer was mistaken for soybean lodging due to a lack of potassium fertilizer. Soybean cyst nematode infestations were confused with potassium deficiency problems. Soybean severe stunt disease was confused with 2,4-D injury.
New problems can often look very similar to old problems.
Pay even closer attention to the clues that don't fit the old pattern. Remember, new problems may require basic research and a longer time to diagnose effectively. Keep a record of everything. Use a camera to take pictures. A visual record of affected plants, normal plants, and field patterns will be very useful.