Eraser Weed Kill is a post-emergent herbicide, meaning it should be applied after the weeds have germinated and started sprouting. The herbicide is non-selective, so it will kill any plant material with which it has contact. Proper mixing will ensure the product's efficacy. Apply the herbicide on a still day so the wind doesn't carry it to desirable plants or garden areas.
Identify the weeds you want to kill as either perennials or annuals. If you cannot identify the weeds, take a photograph to your local garden center for advice.
Remove the cover of a 3-gallon garden sprayer reservoir.
Pour 1 gallon of water into the reservoir. Add 1-1/3 oz. of Eraser Weed Killer if the weeds you want to kill are annuals. Add 2-2/3 oz. if the weeds are perennials.
Replace the cover of the reservoir and shake it gently to incorporate the water and herbicide.