Control of Brown Stain in Sugar Pine with Environmentally Acceptable Chemicals
Keywords:Kiln brown stain, chemical control, sodium azide, phosphoric acid, chelating agents, antioxidants, Pinus lambertiana
AbstractBecause of the hazards in using sodium azide for controlling brown stain, a less hazardous chemical was sought. Phosphoric acid was found to be the most successful treatment of the chemicals screened. A sufficient concentration of an iron chelating agent, in conjunction with lowered pH, resulted in a reduction in brown stain. Antioxidants were found to be ineffective.
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