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West Central Iowa | First time spraying prefix. How soon postemerge do you spray Prefix? Does the first trifoliate have to be fully unfolded? This field was planted June 1 and the first trifoliate leaves aren't quite unfolded yet. Plan was to wait until Sunday or Monday but rain chances are making me want to go sooner if it is safe. Prefix label doesn't really give growth stage minimum for spraying but I have been told to wait until the first trifoliate leaves are out. Due to several factors the field was field cultivated and planted followed very soon by a rain, so a pre emerge was not able to be applied before the beans emereged. Lots of acres in the area are in the same situation due to the crazy rain pattern we have been experiencing. We have 2 small fields in this condition and the rest we were able to get a preemerge on. | |
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When to spray Prefix post emergence
