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The Importance of Shoot Entry in the Action of Herbicides Applied to the Soil

Published online by Cambridge University Press:  12 June 2017

C. Parker
C. Parker*
Affiliation:
Department of Horticulture, Purdue University
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Abstract

A technique was developed for the bioassay in 48 to 84 hours of herbicides in soil or of herbicidal solutions applied to sand. Sorghum seedlings are grown against the lids of petri dishes which are filled with a moistened sand or soil medium. A modification of this technique allows the assessment of the relative importance of uptake by the root and the shoot of a range of herbicides incorporated in sand or soil.

Ethyl N,N-dipropylthiolcarbamate (EPTC), 2,3-dichloroallyl N,N-diisopropylthiolcarbamate (diallate), 2-chloroallyl-N,N-diethyldithiocarbamate (CDEC), and possibly 2-chloro-N,N-diallylacetamide (CDAA) are dependent on uptake via the shoot prior to emergence for their characteristic toxic effects. Isopropyl N-(3-chlorophenyl) carbamate (CIPC), 2,6-dichlorobenzonitrile (dichlobenil), and 2,6-dinitro-N,N-dipropyl-4-trifluoromethylaniline (trifluralin) can exert their action through direct uptake by the shoot, but root uptake appears to be much more effective. A number of other compounds appear to be ineffective when uptake is via the shoot from moistened sand.

Type
Research Article
Information
Weeds , Volume 14 , Issue 2 , April 1966 , pp. 117 - 121
Copyright
Copyright © 1966 Weed Science Society of America 

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References

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