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.

Advanced RUSLE2 Workshop

August 26, 2013

By Angela Rieck-Hinz, Department of Agronomy, and Kapil Arora, Iowa State University Extension and Outreach

Iowa State University Extension and Outreach and the Iowa USDA-Natural Resource Conservation Service (NRCS) have scheduled an Advanced RUSLE2 workshop for Sept. 26, 2013, at the Polk County Extension Office in Altoona. This workshop starts at 8 a.m.

Soybean Diseases Starting to Wake Up

August 21, 2013
Early symptoms of Sudden Death Syndrome

By Daren Mueller, Department of Plant Pathology and Microbiology

After taking much of the growing season off, soybean diseases are finally starting to wake up and make a bit of noise.

Soybean rust

Yes, you read correctly, a soybean rust update. It has been a few years. Dr. Carl Bradley has a nice article on the status and risk of soybean rust in Illinois. The article includes the most common look-alike diseases.

Palmer Amaranth Confirmed in Western Iowa

August 20, 2013
Palmer amaranth in Harrison County

By Bob Hartzler, Department of Agronomy, and Rich Pope, Harrison County Extension

The presence of Palmer amaranth was recently confirmed in Harrison County near the Missouri River. The infestation was in two fields that have a history of land application of sludge. Because of the magnitude of the infestation, we believe the weed has been present for at least two growing seasons. We suspect the weed probably has spread to other fields in the area, but at this time we have not verified this.

Field Day at Iowa State University Ag Engineering/Agronomy Research Farm

August 20, 2013

By Mark Licht, ISU Extension and Outreach

A field day will be held on Aug. 30, hosted by the Iowa State University (ISU) Agricultural Engineering/Agronomy Research Farm, rural Boone, from 9 a.m. to noon with lunch and tours of the ISU Biocentury Farm following the program.

The event will focus on cover crops and corn production. The field day is free and the public is invited to attend.

Scout Crops for Aphids

August 19, 2013
Soybean aphid density test

Soybean aphid

This is the only species in Iowa that will colonize soybean. Scout weekly from plant emergence until seed set. Aphids prefer to feed on the undersides of leaves and will establish on the newest leaves. If a large colony develops, they will feed on stems. Initial infestations are patchy and located near field edges, but winged aphids can quickly disperse within and between fields. Commercial fields that have reached uniform infestation should be closely monitored in August.


Late-season Corn Development and Frost Probabilities

August 19, 2013
Freeze dates

By Roger Elmore, Department of Agronomy

Cool August temperatures across Iowa slow growing degree day (GDD) accumulations. In addition, Iowa’s late corn planting dates this year obviously impacted the crop as well. These two factors affect corn yield potential.