As prices for liquid UAN (28-0-0) have risen sharply the decision guide for late season N in HRSW had became outdated. The updated guide allows for N prices up to $1.00 per pound of actual N. This would equate to roughly $ 3.00 gallon for liquid UAN.
Friday, July 8, 2011
Wednesday, July 6, 2011
update prepared by Dr. Ian MacRae, UMN Extension Entomologist, NWROC-Crookston
Many field projects are underway and we're scouting small grain and soybean fields to stay on top of what is happening with aphid populations in these crops. Following are comments based on what our field visits are revealing in northwest Minnesota.
Small Grain Aphids
There have been reports of wheat fields in the area with aphid populations reaching or exceeding treatment thresholds. Remember the treatment threshold for aphids in small grains is 8 out of 10 stems with one or more aphids (this will average out to at least 12-15 aphids per stem).