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Root Temperature and Susceptibility to 2,4-D in Three Species

Published online by Cambridge University Press:  12 June 2017

H. P. Cords
H. P. Cords*
Affiliation:
Division of Plant, Soil, and Water Science, University of Nevada, Reno
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Abstract

In studies of the effect of root temperature on the toxicity of 2,4-dichlorophenoxyacetic acid (2,4-D) to rubber rabbitbrush (Chrysothamnus nauseosus (Pall.) Britton), 75 F resulted in the highest mortality following 2,4-D treatment. Root temperatures had no effect on leaf cuticle thickness. In similar studies with Canada thistle (Cirsium arvense (L) Scop.) and Russian knapweed (Centaurea repens L.), little injury resulted from 2,4-D treatment at 45 F whereas at 90 F in Canada thistle and at 60, 75, and 90 F in Russian knapweed, severe injury and/or death resulted.

Type
Research Article
Information
Weeds , Volume 14 , Issue 2 , April 1966 , pp. 121 - 124
Copyright
Copyright © 1966 Weed Science Society of America 

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References

Literature Cited

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