Plant a cover crop. A cover crop with high biomass prior to freezing that includes cereal rye for the allopathic effect. If broadleaves are not included in the cover crop, an application of 2,4-D or dicamba can be applied to help control annual broadleaf weeds that emerge prior to freeze. 

Consider replacing glyphosate with 2,4-D and dicamba mixture, if broadleaf weeds are the only concern.  

If grass weeds are also a concern and the grass weeds are small and growing and glyphosate is not used, there are other products that can help suppress grass weeds. Other products such as paraquat, clethodim, and rimsulfuron. Proper identification is important as these products may not control the same spectrum of weeds as glyphosate.  Review the product label to ensure the target weed is listed. 

Burndown herbicides that have some foliar activity on early spring weeds include products with atrazine, isoxaflutole, mesotrione, rimsulfuron or thiencarbazone, metribuzin, or saflufenacil. 

Products such as Isoxaflutole, rimsulfuron, and thiencarbazone have both foliar and residual activity on grasses and a select number of broadleaf weeds 

Metribuzin, saflufenacil, and mesotrione have foliar and residual activity on marestail, and some control on problem pigweeds such as waterhemp and Palmer amaranth.  

Consider adding a group 15 herbicide (metolachlor, dimethenamid, pyroxasulfone, acetochlor) for residual grass and small seeded broadleaf weed control program. 

Consider using the base rate of 22 oz/acre application rate of Roundup PowerMAX® Herbicide to stretch the supply. Roundup PowerMAX® 3 Herbicide is also available, and the base rate is 20 oz/acre which is equivalent to 22 oz/acre of Roundup PowerMAX Herbicide. 

Identify glyphosate premixes that may be in greater supply or at lower relative costs compared to solo glyphosate products. 

Follow the label of the chosen product and make sure the equipment is calibrated with the correct nozzles, and weeds are the correct size for best results.  

For corn, if a residual product does not contain a group 15 herbicide in the post emergence application, replace it with one that does.  

Use tillage when possible, perhaps in-season cultivation.  

To find a replacement herbicide, consult the herbicide labels and weed management guides available from either Universities or government agricultural agencies as they provide ratings as to the effectiveness of products against certain weeds.