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Differential Response of Ditchbank Grasses to Herbicides

Published online by Cambridge University Press:  12 June 2017

J. M. Hodgson
J. M. Hodgson*
Affiliation:
Plant Sci. Res. Div., Agr. Res. Serv., U.S. Dep. of Agr., Bozeman, MT 59715
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Abstract

Herbicides were evaluated for selectivity between three tall coarse grasses and three short fine grasses. Reed canarygrass (Phalaris arundinacea L.), quackgrass [Agropyron repens (L.) Beauv.], and smooth brome (Bromus inermis Leyss) were consistently more susceptible to amitrole-NH4CN (3-amino-s-triazole-ammonium thiocyanate) than three desirable short grasses, Kentucky bluegrass (Poa pratensis L.), creeping red fescue (Festuca rubra L.), and redtop (Agrostis alba L.). Reed canarygrass and redtop were more susceptible to dalapon (2,2-dichloropropionic acid) than creeping red fescue. Amitrole-NH4CN and dalapon combinations were more toxic to reed canarygrass, smooth brome, and redtop than creeping red fescue. Pyriclor (2,3,5-trichloro-4-pyridinol) was quite toxic to all grasses with Kentucky bluegrass showing the most tolerance. When TCA (trichloroacetic acid) was combined with amitrole-NH4CN results were similar to the dalapon combination but overall toxicity was reduced.

Type
Research Article
Information
Weed Science , Volume 21 , Issue 5 , September 1973 , pp. 421 - 423
Copyright
Copyright © 1973 Weed Science Society of America 

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References

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