The early planted corn now has a good canopy over the row. For grass control, Accent and Liberty can be applied up the 8th leaf stage of the corn. For broadleaf weed control, PeakPlus can be applied up to the 7 leaf stage of corn, Pardner up to the 8 leaf stage of the corn and Basagran Forte can be applied at any growth stage of the crop. Wet or waterlogged soils continue to be a problem for application of post emergence of herbicides. Where the corn is too advanced for an over the top herbicide application, the use of drop nozzles may be the only alternative.
Soybeans range from the just emerged to the third trifoliate stage.
Many of the broadleaf weeds and annual grasses have emerged with the crop. Soybean stage is very important when selecting herbicides. A diagram on the Stages of Soybean Leaf Development can be found in the Guide to Weed Control on page 147. If you plan to use Pursuit or CleanSweep, these products will control annual grasses up to the 2 true leaf stage of the weeds. Viper and Meridian Plus will control foxtails up to the 4th leaf stage and barnyard grass and fall panicum to the 6th leaf stage of the weeds.