This has really been an exciting spring already. I heard of 600 acres of corn planted around Webster. Hopefully each seed has a jacket. Time will tell whether it works or not.
Many questions have been raised this spring. What is the soil temperature? What effects will last year's compaction have on this year's crop? What will seed do in cold, water saturated soils? What herbicides can I use on the corn when I use organophosphate insecticides? I will try to address these questions tonight.
Soil temperatures here in SE Iowa are remarkedly warm. Yesterday's was 56 degrees at 4" depth. They have been hovering around 49 to 56 degrees. I think that is great. Now if we could stop the rain. If you want to keep up on the soil temps, you can follow me on twitter at http://twitter.com/pdraisey. I list rainfall and soil temperatures daily. I try daily anyway. If you are from outside the Keota area, ISU has a webpage you can go to see the temps in your county. That webpage is http://extension.agron.iastate.edu/NPKnowledge/soiltemphistory.html .
I have a couple customers that use an organophosphate insecticide along with VT3 corn seed. They see an addtional yield response that more than pays for the insecticide. There are secondary pests, or nematodes that will effect the young seedling on continuous corn fields. There are cautionary statements on the labels of the insecticides that warn agaisnt using certain herbicides following application of insecticides. If you are in this group of producers, please be sure to read and follow the labels. There is an extension publication from the University of Illinois that explains and covers all the factors that lead to seedling problems that arise from using the wrong herbicide with an insecticide. The main problem is that the plant takes in both the herbicide and insecticide and is unable to metablize both chemicals and injury usually follows. The webpage is http://ipm.illinois.edu/bulletin/print.php?id=1271 .
I hope these pages are of some help. If you have any questions, give me a call.
Thanks
Perri
319-929-7851
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