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Preharvest Intervals for Soybean Herbicides Applied Postemergence

Aaron Hager

Department of Crop Sciences
University of Illinois

June 22, 2023
Recommended citation format: Hager, A.. "Preharvest Intervals for Soybean Herbicides Applied Postemergence." Department of Crop Sciences, University of Illinois, June 22, 2023. Permalink


Nearly all herbicide labels (soil-applied or postemergence) have rotational crop intervals that specify the amount of time that must elapse between herbicide application and planting a rotational crop. This becomes particularly important with late-season herbicide applications, and when soil moisture is limited. Additionally, the labels of almost all postemergence soybean herbicides indicate a preharvest interval or a soybean developmental stage beyond which applications cannot be made. Labels of some products may indicate both a developmental stage (before soybean bloom, for example) and a preharvest interval. Preharvest intervals indicate the amount of time that must elapse between the herbicide application and crop harvest. Failure to observe the preharvest interval may result in herbicide residue levels in the harvested portion of the crop in excess of established limits. Also, livestock grazing or foraging treated soybean is not allowed on the labels of many postemergence soybean herbicides. Table 1 contains information regarding preharvest intervals and grazing restrictions for a number of postemergence soybean herbicides.


Table 1.  Preharvest intervals and grazing restrictions for herbicides applied postemergence in soybean.

Herbicide Preharvest Interval Forage or Grazing
Anthem Maxx 60 days No
Assure II 80 days No
Basagran None listed on label Yes, after 30 days
Cadet 60 days No
Classic 60 days Yes, after 14 days
Cobra or Phoenix 45 days No
Dual Magnum 75 days No
Engenia Do not apply after June 12 in IL Yes, after 7 days
Enlist One/Enlist Duo 50 days No
EverpreX 90 days No
FirstRate 70 days Yes, after 25 days
Flexstar/Flexstar GT 45 days No
Fusilade DX 60 days No information on label
Fusion Prebloom No
Intermoc 90 days No
Liberty/Interline/Cheetah 70 days No
Outlook Fifth trifoliate No
Roundup PowerMax1 Broadcast: through R2

Harvest aid: 14 days


Yes, after 14 days

Harmony SG/GT XP 60 days SG: Yes, after 7 days


Marvel 60 days No
Moccasin 90 days No
Perpetuo 60 days No
Poast or Poast Plus 75 days Hay
Prefix 75 days No
Pursuit 85 days No
Python 85 days No
Raptor Prebloom No information on label
Resource 60 days No
Select or SelectMax 60 days No
Sequence 75 days No
Storm 50 days No
Synchrony XP 60 days Yes, after 14 days
Tavium Do not apply after June 12 in IL No
Ultra Blazer 50 days No
Warrant/Warrant Ultra Before R2 No
XtendiMax Do not apply after June 12 in IL Yes
Zidua SC Sixth trifoliate No information on label

1Data, taken from the Roundup PowerMax 3 label, are for broadcast applications in glyphosate-resistant soybean varieties.  Intervals change for applications (spot treatment and preharvest) made to nonglyphosate-resistant soybean varieties.  Forage and grazing allowances can vary among glyphosate-containing products.  Consult the respective glyphosate product label for specific information on forage and grazing restrictions.



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