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[pik-luh-ram, pahy-kluh-] /ˈpɪk ləˌræm, ˈpaɪ klə-/
noun, Chemistry
a colorless powder, C 6 H 3 Cl 3 N 2 O 2 , used as a systemic herbicide for controlling annual weeds and deep-rooted perennials on noncrop land.
Origin of picloram
1960-65; reverse compound from am(inotrich)lor(o)pic(olinic acid); see amino-, tri-, chloro-, picolinic Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for picloram
  • picloram is moderately to highly persistent in soils.
  • picloram also breaks down in sunlight which reduces its residual activity.
  • Although picloram overcomes the effects of weather, it does not fully overcome the effect of growth stage.
  • Controlled burning and application of the herbicide picloram have also been effective.

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