By Anne Dorrance, Ohio State University Extension plant pathologist
There are some things to keep track of this fall as the combines run across the soybean fields.
- Make note of those low yield spots in soybeans to soil sample for soybean cyst nematode levels.
- Did you leave unsprayed strips? Harvest each of these first separately. Yield is not even throughout a field so comparisons to the average of these unsprayed strips are a more accurate measure of what the baseline level of yield is within a field. This is the number to compare yields for any treatments.
- Note: the outside borders of the field are usually not comparable since these have additional secondary factors such as shade from trees, compaction, old fence rows etc. which can impact yield.
- Fields with Sclerotinia should be harvested last. Yes, seed quality will continue to decline but this will avoid contaminating equipment with sclerotia, which can then be introduced into more fields.