I need to do a fair amount of spot spraying in my yard to kill off grassy weeds and would like to use a marker dye to keep track of where I have sprayed.
From what I have read, the effectiveness of glyphosphate is sensitive to water chemistry. Apparently, glyphosphate molecules can bind to other molecules that are present in hard water, reducing it's efficacy. There have even been suggestions that this phenomenon is often misinterpreted as herbicide resistance.
Based on the above, I am wondering if marker dyes might negatively impact the herbicide. I have read the labels for marker dies as well as gly, and not found anything definitive. From the glyphosphate label:Agriculturally-approved colorants or marking dyes may be added to this product. Colorants or dyes used in spray solutions of this product may
reduce performance, especially at lower rates or dilutions. Use colorants or dyes according to the manufacturer’s recommendations.
None of the dye labels that I have looked at address the effect of the product on glyphosphate activity.
Does anybody know or had experience using marker dyes with gly?