Spring Sampling OK for Two Corn Nematode Species
By Greg Tylka, Department of Plant Pathology
Integrated Crop Management News
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Winter Annual Weeds and SCN – Is There Cause for Concern?
By Greg Tylka, Department of Plant Pathology
The frequency of occurrence of winter annual weeds in Iowa fields has increased as more fields are managed with no-till production practices. And in recent years, scientists have discovered that the winter annual weeds purple deadnettle, henbit and field pennycress are moderate to good hosts for the soybean cyst nematode (SCN).
Be Careful with Susceptible Soybean Variety in Rotation to Manage SCN
By Greg Tylka, Department of Plant Pathology
The soybean cyst nematode (SCN) can be managed effectively by growing SCN-resistant soybean varieties. There currently are more that 700 SCN-resistant soybean varieties available in maturity groups 1, 2 and 3 for Iowa growers. Information on the varieties is available in ISU Extension publication Soybean Cyst Nematode-Resistant Soybean Varieties for Iowa (PM 1649, pdf).
How Soon Should I Start Field Operations?
By Mahdi Al Kaisi, Department of Agronomy, and Mark Hanna, Department of Agricultural and BioSystems Engineering
Check Fields for Soybean Cyst Nematode
By Greg Tylka, Department of Plant Pathology
Damage due to the soybean cyst nematode (SCN) can reduce soybean yields in Iowa by 50 percent or more, particularly under very dry conditions. And some believe the chances of severe drought conditions occurring in Iowa are greater for 2008 than for any year since 1990.
March 2008 La Nina Update
By Elwynn Taylor, Department of Agronomy
An area of warm sea surface temperature has formed off the Peru coast. Watch this to possibly “kill” La Nina. By March 3 the water north of Australia was cooling and west of Peru was warming.Two signs of a La Nina about to fade (and with it the risk of serious Midwest drought diminishes somewhat).