The first case of field-evolved resistance of European corn borer (ECB) to Bt transgenic corn has been reported in Canada. What does this mean for Nebraska corn farmers and how can they help maintain resistance here?
With several sunny days last week planting progressed with 70% of corn and 40% of soybeans now planted. Continued progress will likely be delayed in many areas where there was rain and even snow early this week.
A closer look at air and soil temperatures in April and soybean germination and emergence from 10 planting dates did not find chilling injury, despite periods below 50°F. Further research is needed to better understand the imbibitional period in soybean.
As of Sunday 46% of the state's corn was planted, up from 35% last week, but well behind the five-year average of 72%. Approximately 20% of soybean had been planted, up from 14% last week, but well behind the average of 32%.
Farmers affected by early spring flooding likely have increased yield risk from changed soil characteristics, excess moisture, or late planting and may want to consider adjusting their plans for 2019 grain sales.
Research suggests that staying with a full-season hybrid until late May often provides the best yield. If planting is delayed to late May or early June, consider a medium-season CRM might be considered.