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Studies on the Cut-surface Method I. Translocation in Blue Oak and Madrone

Published online by Cambridge University Press:  12 June 2017

O. A. Leonard ,
R. K. Glenn  and
D. E. Bayer
O. A. Leonard
Affiliation:
Department of Botany, University of California, Davis
R. K. Glenn
Affiliation:
Department of Botany, University of California, Davis
D. E. Bayer
Affiliation:
Department of Botany, University of California, Davis
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Abstract

(Arbutus menziesii Pursh.) trees in the field (15–20 cm diameter) xyacetic acid (2,4-D*) and 2,4-5-trichlorophenoxyacetic acid (2,4,5-T*) in blue oak (Quercus douglasii H. & A.) seedlings occurred following application of these herbicides to cuts made through the bark into the wood of stems. Downward transport was limited. C14-labeled 3-amino-1,2,4-triazole (amitrole*), maleic hydrazide (MH*), urea*, and P32-labeled phosphate translocated extensively into the roots as well as upward into the shoots. High humidity had little effect on translocation of 2,4-D* and 2,4,5-T* into the roots, but had marked effect on translocation of amitrole*, MH*, and urea*. The addition of herbicidal amounts of unlabeled 2,4-D or 2,4,5-T reduced translocation of labeled compounds into the roots. Unlabeled 4-amino-3,5,6-trichloropicolinic acid (picloram) or 2,4-D applied to cuts prevented translocation into the roots of all but traces of MH* applied to the same cuts. Treatment of blue oak or madrone (Arbutus menziesii Pursh.) trees in the field (15–20 cm diameter) with herbicidal doses of 2,4-D or picloram largely inhibited the downward movement of P32O4 applied to the same cuts at all stages of growth; such interference was less pronounced in madrone than in blue oak.

Type
Research Article
Information
Weeds , Volume 13 , Issue 4 , October 1965 , pp. 346 - 351
Copyright
Copyright © 1965 Weed Science Society of America 

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References

Literature Cited

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