Integrated Crop Management News

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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. Read more about Wanted: Soybean Fields with Seedling Blight

Corn Rootworm Egg Hatch Underway in 2013

June 14, 2013

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.

Read more about Corn Rootworm Egg Hatch Underway in 2013

SCN Females Already Seen on Soybean Roots

June 5, 2013

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 Read more about SCN Females Already Seen on Soybean Roots

Late Planting and Replanting Corn - June 2013 (Part 2)

June 4, 2013

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. Read more about Late Planting and Replanting Corn - June 2013 (Part 2)