Issue No. 3/April 14, 2006
ALERT:Use Caution when Preplanting Anhydrous Ammonia and/or Using Urea in Starter
While nitrogen fertilizers are very beneficial for crop production, if misapplied they can cause serious crop growth problems early in the season. To minimize the risk of such damage, keep anhydrous ammonia and urea containing products away from the seed and rooting zone of small plants.
Remember to Plant Non-Bt Corn Refuges
As corn planting begins in earnest, it is important to remember to plant non-BT refuges to preserve Bt technology for our future.
Black Cutworm Flights Getting in Full Swing
Be sure to scout fields that are especially attractive for egg laying as corn planting begins to coincide with flights of black cutworm moths. A black cutworm fact sheet is available online.
Early Spring Insects and Weeds--Some Things Just Don't Work Together
Early-season weed species--suitable hosts for many early-season insects--will begin to grow rapidly with an increase in air and soil temperatures. Degree-day accumulations can be used to predict both insect activity and emergence of summer annual weeds.
True Armyworm Moth Captures Reach Impressive Levels in Kentucky
Given reports of very large captures of true armyworm moths in Kentucky, it makes sense to become familiar with scouting procedures and economic thresholds for armyworm larvae in pastures, small grains, and seedling corn.
Anticipating Alfalfa Weevils
Very current maps of degree-day accumulations in Illinois, available online, enable users to keep track of alfalfa weevil development and predict occurrences in their life cycle. Warmer weather will speed things considerably; continued scouting is encouraged.
Section 18 Label Granted for the Fungicide Folicur to Control Fusarium Head Blight (Scab) on Wheat in Illinois in 2006
The U.S. EPA has granted a Section 18 label for using Folicur to manage scab on wheat in Illinois through June 20, 2006. Timely application is critical.
Winter Wheat Disease Virus Update
Viral diseases are one potential cause of leaf discoloration this time of year. A thorough review of early-season wheat virus diseases is provided in response to concerns about purpling of winter wheat in some fields.
The Illinois Outlook: Can It Happen Here?
It is likely only a matter of time until glyphosate-resistant weeds become a matter of concern in the Illinois agronomic landscape.
Know What's Planted Where
Corn hybrids with resistance to various herbicide classes may offer advantages for weed management, but precautions are in order to avoid later problems.
When Corn Follows Corn
What should producers do differently when planting corn following corn instead of corn following soybean? A number of points to consider are outlined.
Reports are provided this issue for northern, southern, and west-central Illinois.