Replanting is often a difficult decision. In fields with questionable stands, there are several things to consider before making a replant decision. If plant distribution is fairly uniform in fields on productive soils, good yields can be made with low plant populations in the low 20,000 range, or as low as one per row-foot with no or few skips. If the stand is broken with numerous skips, replanting is in order at populations below 30,000 plants per acre, depending on the size and frequency of skips.
Calendar date is significant.
A stand you would plow up on May 1 would probably be kept on May 25. If replanting is necessary, continue to use fungicides as appropriate. If replanting is done on the stale row, use a burn-down herbicide to kill the old stand and weeds which may have emerged on the row. This treatment could be mixed with the preemergence materials. Recommendations on this web site do not endorse any commercial products or trade names.