Abstract
Recovery of (2,4,5-trichlorophenoxy)acetic acid (2,4,5-T), as the acid and ester, was significantly greater in live oak(Quercus virginianaMill.) tissues treated with mixtures of the 2-ethylhexyl ester of 2,4,5-T (2 lb/A)-.potassium salt or isooctyl ester of 4-amino-3,5,6-trichloropicolinic acid (picloram) (1/2, 1 and 2 lb/A) than in tissues treated with 2 lb/A 2,4,5-T ester alone. Recovery of 2,4,5-T as the ester was noted in the middle and lower-stem tissues. Between 90 and 99% of the herbicide recovered 1 month after treatment was gone 6 months after treatment. Evaluation of brush reduction 2 years after treatment indicated that mixtures of picloram salt and 2,4,5-T resulted in greater reduction of brush than mixtures of picloram ester and 2,4,5-T or 2,4,5-T alone.
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