Complaint
| Active ingredient | Clopyralid 30% SL |
| Classification | Herbicide / Agrochemical |
| Chemical name | 3,6-dichloro-2-pyridinecarboxylic acid |
| Biochemistry | Synthetic auxin (acting like indolylacetic acid). |
| Mode of action | Selective systemic herbicide, absorbed by the leaves and roots, with translocation both acropetally and basipetally, and accumulation in meristematic tissue. Exhibits an auxin-type reaction. Acts on cell elongation and respiration. |
| Usage | Post-emergence control of many annual and perennial broad-leaved weeds of the families Polygonaceae, Compositae, Leguminosae, and Umbelliferae, in sugar beet, fodder beet, oilseed rape, maize, cereals, brassicas, onions, leeks, strawberries and flax (at 70-300 g a.e./ha), and in grassland and non-crop land (at 300-560 g a.e./ha). Provides particularly good control of creeping thistle (Cirsium arvense), perennial sow-thistle, coltsfoot, mayweeds, and Polygonum spp. |
| Mammalian Toxicology | Oral: Acute oral LD50 for male rats 3738, female rats 2675 mg/kg. Skin and eye: Acute percutaneous LD50 for rabbits >2000 mg/kg; a severe eye irritant, not a skin irritant. Inhalation: LC50 (4 h) for rats >0.38 mg/l. |
