picloram
(ˈpɪkləræm)
[f. picoline + chlor-2 + amine.]
A white crystalline compound, 4-amino-3,5,6-trichloropicolinic acid, C6H3Cl3N2O2, which is used as a herbicide and defoliant against deep-rooted weeds and woody plants.
| 1965 Proc. Northeast. Weed Control Conf. XIX. 140 Effective control [of mugwort]..was obtained with..4-amino-3,5,6-trichloropicolinic acid (picloram). 1965 B.S.I. News May 24 The following new names have been approved by the Pest Control Products Industry Standards Committee for eventual inclusion in B.S. 1831... picloram... 4-amino-3,5,6-trichloropicolinic acid. 1969 Sci. Jrnl. Feb. 10/1 According to one estimate, no less than 2250 tonnes of picloram have been dumped on South Vietnam in 1968. 1970 Guardian Weekly 21 Feb. 6/4 The recently introduced chemical, picloram, is one of the longest-lived pesticides. 1974 Sci. Amer. Apr. 49/2 The herbicides sprayed over Vietnam were chemicals that are routinely applied for weed control: 2,4-D and 2,4,5-T, picloram and cacodylic acid. |