Corn and soybean growers should be scouting for Japanese beetles, which have started emerging in eastern Nebraska. First identified in counties along the state's eastern border several years ago, the beetles were found as far west as Lincoln County in 2016.
It's important to consider soybean growth stage and preharvest interval when applying postemergence herbicides to avoid potential crop injury. This article describes how to determine crop growth stage and includes a table of application restrictions for common postemergence herbicides.
For the week ending June 11, Nebraska temperatures averaged four to eight degrees above normal and were accompanied by dry conditions, according to the USDA’s National Agricultural Statistics Service. Only the southern tip of the Panhandle and a few central counties received significant rain. The warm, dry weather allowed planting and other field work to continue.
Controlling glyphosate-resistant volunteer corn is a major challenge in some soybean fields this year as preemergence herbicides aren't very effective. Postemergence herbicides will be critical to its management.
Cool, wet conditions in May may be contributing to soybean seedling injury from disease. Scouting is recommended to identify diseases and differentiate injury from that caused by herbicides when determining potential stand loss.
For the week ending June 4, with warmer temperatures and rain limited to the western Panhandle, planting progressed with 6.4 days suitable for fieldwork, according to the June 5 report from the National Agricultural Statistics Service.
Cool, wet soil conditions in late April and May may have enhanced the potential for soybean injury from PPO-inhibiting herbicides. The author describes plant injury symptoms to look for when scouting young soybean seedlings.