by Rich Pope, Department of Entomology
Accumulated Base: 50° F Degree Days May 1 through May 29, 2005
We were blessed by a pretty normal week with all crops growing well in most areas. Some replanting was necessary, particularly in some southern Iowa fields where the crop had emerged or was just emerging when the freezes came about two weeks ago. Also, a few places suffered from seedling blights that took stands down. Damping off is caused by soil-borne fungi and is favored by cool, wet conditions. Seeds that have taken up water but cannot grow for a few days because of low temperatures, are particularly at risk. Warm soils as we enter June will help new plantings avoid some of the seedling blight problems.
Check the stalk borer article posted in this issue of ICM Newsletter (pages 104105). Larval migration to border corn rows is starting in southern Iowa now.
This article originally appeared on page Page 7 of the IC-494(12) -- May 31, 2005 issue.