Glyphosate is adsorbed to soil particles and unavailable for root uptake. It persists in the soil for several weeks. Typical symptoms of affected plants are whitened foliage, followed by browning and death. This non-selective, contact herbicide is generally considered to lack the capacity to translocate within plants. Thus it will control the tops of perennial weeds, but not the root system.
Symptoms appear within hours of application and desiccation occurs within two days.
This product does not control wild buckwheat. Although paraquat is highly soluble in water, it binds with soil particles and is not available to plant roots nor does it leach. The use of trifluralin, preplant and incorporated into the soil, followed by linuron as a pre-emergence spray provides control of a broad spectrum of weed species. Higher application rates are specified on the label for soils with soil organic matter greater than 6 per cent. Herbicide carryover into the following growing season will be greater under dry soil conditions.