Abstract
Fast-acting-herbicides containing cacodylic acid (dimethylarsenic acid) significantly reduced broods of Dendroctonus adjunctus (Hopkins), D. obesus (Mannerheim). D. ponderosae Hopkins, and D. pseudotsugae Hopkins in naturally infested trees. The chemical was injected directly into the sap stream near ground level. Application was made soon after the attack, before most of the eggs had hatched
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