Estimating Nitrogen Losses
One way to determine nitrogen (N) loss is to calculate an estimate. Predicting the exact amount is quite difficult as many factors affect losses. However, estimates can provide guidance for supplemental N applications.
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.
Post Emergent Damping Off of Corn Prevalent in Some Fields
Reports are coming into campus of corn seedlings with symptoms of post emergent damping off. Now is the time to evaluate corn stands.
Field Diagnostic Clinic is a Return to the Basics
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.
Crop Management Clinic Features 20 Management Topics
The Crop Management Clinic is an intensive two-day training program that focuses on the latest developments in crop production and protection. It will be held July 13-14.
Hail on Corn
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.
Sampling for Nematodes that Feed on Corn This Season
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
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.
Start Scouting Beans for Damping Off
Scouting now for damping off of soybean seedlings will help producers make informed seed treatment decisions in the future.
Iowa State Research Farm Field Days to Begin June 15
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.
Spring Control of Multiflora Rose
Late spring is an excellent time for controlling multiflora rose since herbicide applications at this time generally provide more consistent control than applications made later in the growing season after flowering.