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Uptake and Translocation of Terbacil in Strawberry (Fragaria × ananassa) and Goldenrod (Solidago fistulosa)

Published online by Cambridge University Press:  12 June 2017

Andree L. Genez
Affiliation:
Dep. Hortic. Sci., North Carolina State Univ., Raleigh, NC 27650
Thomas J. Monaco
Affiliation:
Dep. Hortic. Sci., North Carolina State Univ., Raleigh, NC 27650

Abstract

Terbacil (3 - tert - butyl - 5 - chloro - 6 - methyluracil) uptake by roots and translocation were evaluated as possible bases of tolerance in two species, strawberry (Fragaria × ananassa Duchesne 'Sunrise’ and ‘Guardian’) and goldenrod (Solidago fistulosa Miller). Tolerance of goldenrod to terbacil was at least five-fold that of strawberry. Strawberry was at least four - fold more tolerant than highly terbacil - sensitive cucumber (Cucumis sativus L. ‘Chipper’). Guardian, a reported susceptible strawberry cultivar, was as tolerant to terbacil as the tolerant cultivar, Sunrise. Distribution of 14C within the plant, but not uptake of label through roots, was found to be correlated to relative tolerance to terbacil when the roots of intact plants of all species were exposed for various time periods to a nutrient solution containing 2 -14C terbacil. The observed distribution patterns suggest that tolerance to terbacil in strawberry and goldenrod is at least partially attributable to the restricted translocation of root - absorbed herbicide. The greater tolerance of goldenrod than strawberry to terbacil was apparently unrelated to the restriction of herbicide to root tissue.

Type
Research Article
Copyright
Copyright © 1983 Weed Science Society of America 

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