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Injection Methodology for Evaluating Plant Growth Retardants

Published online by Cambridge University Press:  12 June 2017

J. P. Sterrett
J. P. Sterrett*
Affiliation:
Agric. Res., Sci. Ed. Admin., U.S. Dep. Agric., Frederick, MD 21701
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Abstract

This study describes separate methods for injecting growth retardants into herbaceous and woody plants. Bean plants (Phaseolus vulgaris L. ‘Black Valentine’) were treated by injecting growth retardant solutions into the hypocotyl cavity with a syringe. The chemical was subsequently absorbed into the vascular system. Woody California privet (Ligustrum ovalifolium Hassk.) was injected by forcing chemical solution into the vascular system via a predrilled hole. Results with NAA (1-napthalene-acetic acid) and MH (1,2-dihydro-3,6-pyridazinedione) validated the methods by inhibiting growth, respectively. New growth regulators, mefluidide {N-[2,4-dimethyl-5-[[(trifluoromethyl) sulfonyl]amino]phenyl]acetamide} and dikegulac (sodium salt of 2,3: 4,6-bis-O-(1-methylethylidene-α-L-xylo-2-hexulofuranosonic acid], inhibited the growth of bean with concentrations of 60 mg/L and 480 mg/L, respectively. Sprout growth of privet was inhibited by 30 mg/L of mefluidide and by 188 mg/L dikegulac.

Keywords

Phaseolus vulgarisLigustrum ovalifoliummefluididedikegulacpiproctanylium bromide
Type
Research Article
Information
Weed Science , Volume 27 , Issue 6 , November 1979 , pp. 688 - 690
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

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