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Morphological Response of Two Mesquite Varieties to 2,4,5-T and Picloram

Published online by Cambridge University Press:  12 June 2017

Herbert M. Hull  and
Howard L. Morton
Herbert M. Hull
Affiliation:
Plant Physiol., Plant Sci. Res. Div., Agr. Res. Serv., U.S. Dep. of Agr., Tucson, Arizona 85719
Howard L. Morton
Affiliation:
Plant Physiol., Plant Sci. Res. Div., Agr. Res. Serv., U.S. Dep. of Agr., Tucson, Arizona 85719
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Abstract

Honey mesquite [Prosopis julifiora var. glandulosa (Torr.) Cockerell] and velvet mesquite [P. julifiora var. velutina (Woot.) Sarg.] seedlings were treated on individual leaves with 20 or 40 μg of (2,4,5-trichlorophenoxy)acetic acid (2,4,5-T), 4-amino-3,5,6-trichloropicolinic acid (picloram), or a 1:1 mixture thereof. Formulation of herbicides in a DMSO-complex carrier (dimethyl sulfoxide, ethylene glycol, phytobland oil, water: 50:25:15:10, v/v) enhanced activity considerably over that obtained with an aqueous carrier, the degree of enhancement being greater with 2,4,5-T than with picloram. Lack of major varietal differences in morphological or anatomical response suggests that observed varietal differences in sensitivity of field mesquite to aerial sprays are not a function of the variety itself, but are related to climatic or edaphic differences among sites which the varieties occupy.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 6 , November 1971 , pp. 712 - 716
Copyright
Copyright © Weed Science Society of America 

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References

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