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Effect of Stage of Growth of Field Bindweed on Absorption and Translocation of 14C-Labeled 2,4-D and Picloram

Published online by Cambridge University Press:  12 June 2017

Chuma S. O. Agbakoba  and
J. R. Goodin
Chuma S. O. Agbakoba
Affiliation:
University of California, RIverside; Washington State University, Pullman
J. R. Goodin
Affiliation:
Department of Agronomy University of California, Riverside
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Abstract

The effect of stage of growth of field bindweed (Convolvulus arvensis L.) on absorption and translocation of 14C-labeled 2,4-D and picloram was studied. Three stages of growth investigated were s-week old seedlings, and 7-week old and 16-week old vegetatively propagated plants. One middle leaf of each plant was treated with either 14C-labeled (2,4-dichlorophenoxy)-acetic acid (2,4-D) or 4-amino-3,5,6-trichloropicolinic acid (picloram). Treated plants were harvested after 48 hr and assayed for radioactive 14C. The percent of 2,4-D applied which was absorbed by seedlings was less than that absorbed by adult plants. Picloram absorption was not different in seedlings and 7-week old adult plants, but the 16-week old adult plants absorbed more picloram than either the 5-week old seedlings or 7-week old adult plants. More picloram than 2,4-D was absorbed at all stages of growth. Translocation of both 2,4-D and picloram was greater in seedlings than in older plants. No difference was found in amounts of 2,4-D and picloram translocated by adult field bindweed plants. More 2,4-D than picloram was translocated by seedlings.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 4 , October 1969 , pp. 436 - 438
Copyright
Copyright © 1969 Weed Science Society of America 

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