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Roger Elmore, ISU Extension corn specialist, discusses the things to consider when making the decision whether to replant corn or not. In the second crop minute this week, Erin Hodgson, ISU entomologist, encourages farmers with corn emerging to scout fields for black cutworm. Elmore refers to the table on page 12 in the Corn Field Guide for current relative yield potential of corn by planting date and population.
Black cutworm cutting date predictions have been made based on several peak flights of black cutworm moths.
This growing season the ISU Extension crops team introduces the Crop Minute, a weekly audio crop update. Mike Owen, ISU Extension weed scientist encourages timely application of herbicide during this week's crop minute, telling listeners that moderate to high infestation of weeds can begin to impact crop yield within a couple weeks of emergence.
Look for the weekly Crop Minute on the right side of the ICM News homepage, under More Resources.
mp3 - May 2, 2011
Herbicide selection to rid fields of crop yield destroying weeds needs to be based on well-thought out and informed decisions.
By Roger Elmore, Department of Agronomy
By Roger Elmore, Department of Agronomy
The current soil moisture status makes the soil conditions susceptible to soil compaction, low soil temperature and soil erosion just to name a few. These problems can be yield robbers.
By Roger Elmore, Department of Agronomy
One out of five plants in areas across the Iowa corn field struggled to emerge. The smaller plants had only three collared leaves, V3, at the time I saw them in late May 2008. The larger neighboring plants had at least five collared leaves, V5. Plant—to-plant differences like this reduce yield potential. Weaker plants compete like weeds with the larger, more dominant plants reducing overall productivity. How could plant size differences like this happen?
Consider that there are a number of ways to provide stewardship, and one way that does not. Unfortunately, the one way that does not provide stewardship - recurrent use of the herbicide to which the crop is resistant - continues to prevail.
By Roger McEowen, Center for Agricultural Law and Taxation
In the near future, the last of the Roundup Ready soybean patents will expire. That expiration will be followed by the expiration of other patents on biotech crops and expiring approvals in overseas markets like the European Union and China.
