What is the difference between glyphosate and paraquat?

Glyphosate is a systemic non-selective broad-spectrum herbicide that can basically kill all weeds, killing the roots, but it takes effect relatively slowly, taking 3 to 5 days, and is low in toxicity and highly effective. Paraquat is a contact-type broad-spectrum herbicide that acts quickly, but it cannot kill the roots; it can only kill the stems and leaves above the soil surface, and perennial weeds tend to regrow. It has a certain level of pollution potential. It is moderately toxic, but there is no specific antidote, and the fatality rate after poisoning is high.

Glyphosate is a chronic systemic translocated herbicide. After being sprayed on weeds, it takes effect in 7 to 10 days. It can be absorbed through the stems and leaves of the weeds and translocated downward throughout the whole plant, down to the root system, thereby killing the underground rhizomes of perennial deep-rooted plants. It can also be translocated between different tillers of the same plant, killing tillers or branches that have not come into contact with the pesticide. It can remove the weeds and their roots, and the effect is very good. In production, it is widely used to control annual or perennial grass weeds, dicotyledonous weeds, and so on.

Paraquat, also known as Gramoxone, is a contact herbicide with fast action and non-selectivity. After being sprayed on weeds, as long as the green parts above ground come into contact with the chemical, they will show wilting symptoms within a few hours and all die within 1 to 2 days. Its weed-killing effect is good, and it is very fast.