Will Foliar Diseases be a Problem on Corn This Year?
By Alison Robertson, Department of Plant Pathology
Should I consider spraying a fungicide to protect yield?
Integrated Crop Management News
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What About Foliar Fertilization for Soybean This Year?
By Antonio P. Mallarino, Department of Agronomy
Improving glyphosate performance in Roundup Ready soybean
By Bob Hartzler, Department of Agronomy
Although glyphosate resistant weeds have been documented in states surrounding Iowa, at this time our only confirmed glyphosate-resistant species is horseweed/marestail (Conyza canadensis). However, over the past decade we have selected for a weed spectrum that possesses a higher level of tolerance than was present at the start of the Roundup Ready era of weed management. Because of this, glyphosate control failures are more common now than they were ten years ago.
Corn Following Corn in 2008
By Mahdi Al-Kaisi, Roger Elmore, Antonio Mallarino, Palle Pedersen, Alison Robertson, John Sawyer, and Jon Tollefson
Hail Damage Across a Large Part of Iowa
By Palle Pedersen, Department of Agronomy
Pre-harvest Intervals for Foliar Fungicides on Wheat
By Daren Mueller, Department of Plant Pathology
Degree Days Continue to Lag
By Rich Pope, Department of Plant Pathology
Another week of slightly cool days with scattered storms has Iowa farmers facing uneven stands in many fields. Cumulative heat during the week of June 23 lagged behind long term averages by 10 to 25 degree days in Iowa. The cool temperatures and still wet soils provide stresses to struggling crops, and those stresses are showing up in poor growth. As we get more heat the corn and soybean should recover, but this early summer has predisposed the crops to future stresses.
Yellow Corn, Wet Soils, and N Loss – Part 2
By John Sawyer, Department of Agronomy
Last week (June 19) I provided some observations on corn growth and response to nitrogen (N) applied in an anhydrous ammonia study being conducted at the ISU research farm between Ames and Boone. Following are some observations one week later (June 26, 2008).
Corn Yield Predictions for Replanted and Late-planted Fields
By Roger Elmore, Department of Agronomy
Dealing with Late Weed Escapes in Corn
By Bob Hartzler, Department of Agronomy