Integrated Crop Management News

Links to these articles are strongly encouraged. Articles may be republished without further permission if published as written and if credit is given to the author, Integrated Crop Management News, and Iowa State University Extension and Outreach. If articles are used in any other manner, permission from the author is required.

Crop Minute - In the Corn Field

May 17, 2011

 Roger Elmore, ISU Extension corn specialist, discusses yellow corn emergence and the benefits to producers who walk their fields gathering information to prepare for next year. Look for the weekly Crop Minute on the right side of the ICM News homepage, under More Resources. Or go directly to the May 16, 2011 interviews (mp3).

Crop Minutes - Corn Replanting and Black Cutworm

May 11, 2011

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.

2011 Crop Minutes Begin This Week

May 5, 2011

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

First Step to Achieving Uniform Plants

April 20, 2011
A 2-leaf differential among plants in this corn following corn field

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?