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.

Yellow Corn Plants

June 13, 2011

There are several possible reasons for corn plants showing various shades of yellowing and interveinal leaf stripping.

Measuring Corn Nitrogen Status

June 13, 2011

Tools are available that can aid decisions about applying supplemental nitrogen when there have been losses of applied fertilizer or manure nitrogen.

Hail on Corn

June 6, 2011

By Roger Elmore, Department of Agronomy

Corn progress is back on track thanks to recent warm weather. This is indicated by heat unit accumulation for May 1 planting dates hovering slightly above average (107 percent of average statewide). Corn development across the state ranges from about V2 to V9 (second to ninth leaf stages) thanks to the wide range of planting dates this year.

Field Diagnostic Clinic is a Return to the Basics

June 6, 2011
Field Diagnostic Lab work

The 2011 Field Diagnostic Clinic will be held July 11-12 at the Field Extension Education Laboratory (FEEL) near Ames. This program teaches on the fundamentals of crop plant diagnostics.

Sampling for Nematodes that Feed on Corn This Season

June 5, 2011
Corn at V6 stage of development

Recent research results indicate that V6 growth stage is a good time to collect samples to check for damaging levels of plant-parasitic nematodes that feed on corn. Useful tips for sampling for these pathogens of corn are given in this article.

Stalk Borer Scouting Dates for 2011

June 3, 2011
Stalk borer larva

Corn is infested by stalk borer when stalk borer larvae move to find bigger host plants, typically adjacent to grassy edges of emerging corn. The most susceptible stages of infestation are at V1-V5, or about 2-24 inches in plant height.

Iowa State Research Farm Field Days to Begin June 15

June 1, 2011

Mark Honeyman, Research and Demonstration Farms

The latest in field-based research of crop production and management will be on display beginning June 15 at Iowa State University Research and Demonstration Farm field days across Iowa.

Field days consist of tours of research and demonstration plots at the farms. Topics vary for each farm depending on local interest and conditions.

The public is welcome to attend the field days, which take place rain or shine. They are free unless noted.