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.
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
By Mahdi Al-Kaisi, Department of Agronomy
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.
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.
By John Sawyer, Department of Agronomy
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
By John Sawyer, Department of Agronomy
Part 1: Crop Model Output
By Roger Elmore, Department of Agronomy
Part 2: 2010 and 2011 Field Research Data
By Roger Elmore, Anthony Myers, and Warren Pierson, Graduate Research Assistants Department of Agronomy
Fifteen percent of Iowa’s 2013 corn crop remains unplanted as we write the last week of May. After early concerns about drought continuing to plague us, wet conditions have taken the spotlight. To add insult to injury, more rainfall forecast may refill field ‘ponds’ and re-submerge corn in flood plains of our rivers and streams.
By Jim Fawcett, Extension Field Agronomist
Certified crop advisers (CCAs) can earn five hours of credit (3.0 hours in soil and water management, 1.0 in crop management, 0.5 in pest management and 0.5 in nutrient management) by attending a special CCA morning session, followed by the afternoon spring field day tour at the Southeast Iowa Research and Demonstration Farm near Crawfordsville on June 27.
