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.

Prevented Planting and Crop Cover Considerations

June 19, 2013

By  Stephen K. Barnhart, Department of Agronomy

There continue to be questions about cover crops and prevented planting options. With  the ‘no grazing or harvest until after Nov. 1‘  qualifier, here are my initial thoughts.

 

‘Spring cereals’ – oats, spring triticale, barley, spring wheat          

Wanted: Soybean Fields with Seedling Blight

June 18, 2013

By Alison Robertson, Department of Plant Pathology and Microbiology

This will be our third year surveying soybean fields with seedling blight in an effort to identify what pathogen species contribute to stand loss in Iowa. This survey is part of multi-state projects funded by USDA NIFA and check-off funds from the United Soybean Board and the North Central Soybean Research Project. One goal of the research is to develop diagnostic kits that could be used to identify the causal organisms responsible for seedling blight in a field.

Side-hill seeps result in corn emergence problems

June 17, 2013
Fields with reduced stands due to saturated soils

By Roger Elmore and Mahdi Al-Kaisi, Department of Agronomy

Iowa’s wet spring and cool temperatures not only slowed planting progress but also slowed Growing Degree Day accumulations. These factors contributed to yellow corn plants across the state as well as within-row variability in plant to plant growth and development. Seedling diseases reduced stands.

Corn Rootworm Egg Hatch Underway in 2013

June 14, 2013
Predicted corn rootworm egg hatch in Iowa

By Erin Hodgson and Adam Sisson, Department of Entomology
 

A few areas of Iowa are approaching 50 percent corn rootworm egg hatch now (Figure 1), including the Muscatine area. Many other regions will be reaching 700 degree days within 7-14 days, depending on future temperatures. Cooler spring temperatures in 2013 have slowed down development, especially compared to rootworm hatch last year.

SCN Females Already Seen on Soybean Roots

June 5, 2013
Emerging soybean cyst nematode females

By Greg Tylka, Department of Pathology and Microbiology

The soybean cyst nematode (SCN) is one of the most damaging pests of soybean in Iowa and the Midwest. SCN can cause foliar symptoms of soybean sudden death syndrome (SDS) to occur earlier in the season and to become more severe, leading to increased yield losses from the disease.
 

SCN females on roots marks end of first generation

Pages