cropCENTRAL | Field Crop Production Resources

Replanting soybean fields or areas of fields likely will occur after soybean stand loss to recent cold temperatures or saturated soil conditions.  The following are general reminders about dicamba application timings and restrictions for Illinois soybean.

• Air temperature restriction: do not apply approved dicamba-containing products if the air temperature in the field at the time of applications is greater than 85 degrees Fahrenheit or if the National Weather Service’s forecasted high temperature for the nearest available location for the day of application exceeds 85 degrees Fahrenheit. 

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Soil-residual herbicides are important components of integrated weed management programs.  Reducing the number of weeds exposed to foliar-applied herbicides helps reduce the selection intensity for weeds resistant to foliar-applied herbicides.  Residual herbicides applied with postemergence soybean herbicides also can reduce the need for a second postemergence application.  However, simply applying a soil-residual herbicide does not guarantee the product will provide the desired level or duration of weed control.  Many edaphic and environmental factors influence the level of weed control achieved by soil-residual herbicides.…

Ample soil moisture and warming temperatures are promoting rapid growth and development of many early-season weed species.  Most weeds currently growing in fields emerged last fall and successfully overwintered (winter annuals, biennials or perennials), but several early-season summer annual species recently have emerged.  Existing weed vegetation should be controlled before planting by utilizing tillage, herbicides, or a combination of tactics so the crop can become established under weed-free conditions.
Field scouting to identify the weeds present and their relative densities will provide the information needed to tailor a burndown herbicide program for any particular field. …