... guideline value because not hazardous to health at concentrations normally found in drinking water. Other Not mutagenic, not carcinogenic, not teratogenic ... annual and perennial grasses and broad-leaved weeds, pre-harvest, in cereals, peas, beans, oilseed rape, flax and mustard, at ... control of annual and perennial grasses and broad-leaved weeds in stubble and post-planting/pre-emergence of many crops; ...