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 Greg Tylka, Department of Plant Pathology and Microbiology
Since 1990 the Iowa State University SCN-resistant Soybean Variety Trial Program has evaluated the agronomic performance and nematode control provided by hundreds of soybean varieties advertised as resistant to the soybean cyst nematode (SCN). The work is funded by the soybean checkoff through a grant from the Iowa Soybean Association.
Identifying pests, diseases, disorders and developmental stages in Midwestern corn crops just became easier. New and larger color photographs, updated information on plant diseases and crop production, and additional topics are included in the second edition of Iowa State University’s popular Corn Field Guide, now available for purchase online at https://store.extension.iastate.edu/.
Growers and agronomists will appreciate new environmental criteria added to help identify diseases.
The Iowa State University Integrated Crop Management Conference will be held Dec. 4 and 5 on the Iowa State University (ISU) campus. Registration begins at 7:30 a.m. on Dec. 4 in the Scheman Continuing Education Building and the program concludes at 4:00 p.m. on Dec. 5.
As we work to complete harvest and put the finishing touches on the 2013 growing season, it is not too early to start thinking about 2014 crops. Results of soil samples collected in the next few weeks from fields in which soybeans will be grown in 2014 could mean the difference between “so-so” and profitable yields next year.
Collecting soil cores from a field of harvested corn to check for the soybean cyst nematode.
By Bob Hartzler, Department of Agronomy
Two new infestations of Palmer amaranth have been identified in Iowa since the initial finding in Harrison County in August. Another Harrison County field with Palmer amaranth was found, approximately 15 miles from the first area near Modale. The second area was not as extensive as the first, and there is a good likelihood of eradicating the weed in this area. There is a possibility that transport of materials from the Modale site is responsible for the newer infestation.
By Daren Mueller, Department of Plant Pathology and Microbiology, and Clarke McGrath, ISU Extension and Outreach
By Mahdi Al-Kaisi, Department of Agronomy
By Daren Mueller and Erika Saalau, Department of Plant Pathology and Microbiology
Over the past several weeks, we have received several samples in the Plant and Insect Diagnostic Clinic with irregular blotches and necrotic lesions on the pods.
After eliminating all of the known causes, a sample was screened for several common bean viruses*. The sample came back strongly positive for tobacco streak virus (TSV).
By Lynn Laws
By Roger Elmore, Department of Agronomy
Crop conditions across the U.S. Corn Belt varied dramatically in 2013. Iowa was no exception and this year sits in a rare position in terms of yield potential: lower than several other Corn Belt states.
Iowa – 2013 growing conditions
