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By Forrest W. Nutter, Jr., Department of Plant Pathology, Lu Liu, Sustainable Agriculture Program, Rich Pope, Department of Entomology, and Marlin E. Rice, Department of Entomology
Following an Iowa winter of ice, snow and cold temperatures, the predicted risk for Stewart’s disease of corn in 2008 is negligible throughout most of Iowa, with only the southeastern-most counties having a low risk.
By Rich Pope, Department of Entomology
Warm-blooded animals including humans generate their own internal heat and have regulatory systems to hold maintain body temperature in an operational range. These systems provide insulation from fluctuations of temperature in the environment and allow growth and development based on the passage of time in minutes, hours, weeks, months and years.
By Roger Elmore and Lori Abendroth, Department of Agronomy
Rain is forecast again for most of Iowa later this week. Little if any spring work has occurred because of cold weather and already saturated soils. More rain right now is not welcome for most of us corn growers!
By Antonio Mallarino, Department of Agronomy
By Daren Mueller, Extension Plant Pathologist
By Lori Abendroth, Palle Pedersen and Roger Elmore, Department of Agronomy
By Mahdi Al-Kaisi, Department of Agronomy and Mark Hanna, Department of Agricultural and Biosystems Engineering
By Greg Tylka, Department of Plant Pathology
Bob Hartzler, Department of Agronomy
As more Iowa fields develop a history of no-till production, infestations of winter annual weeds are on the increase. The first step in managing winter annuals is proper identification of the species infesting the field. Many agronomists are relatively weak at identifying these weeds. A regional extension publication - Early spring weeds on no-till crop production (NCR 614) - can assist in this process.
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).
