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Response of Fusarium solani f. sp. pisi and Pythium ultimum to Glyphosate

Published online by Cambridge University Press:  12 June 2017

Michael K. Kawate ,
Susan C. Kawate ,
Alex G. Ogg Jr.  and
John M. Kraft
Michael K. Kawate
Affiliation:
Washington State Univ., Irrigated Agric. Res. and Ext. Ctr., Prosser, WA 99350-9687
Susan C. Kawate
Affiliation:
Oregon State Univ., Irrigated Agric. Res. and Ext. Ctr., Prosser, WA 99350-9687
Alex G. Ogg Jr.
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Irrigated Agric. Res. and Ext. Ctr., Prosser, WA 99350-9687
John M. Kraft
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Irrigated Agric. Res. and Ext. Ctr., Prosser, WA 99350-9687
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Abstract

The effect of glyphosate on growth and reproduction of two pathogenic fungi of green peas was evaluated in laboratory studies. Liquid and agar media containing 0 to 50 mM glyphosate were inoculated with two isolates each of Fusarium solani f. sp. pisi and Pythium ultimum. Mycelial growth and spore production of the fungi were inhibited or stimulated by glyphosate, depending on concentration. Glyphosate did not affect pathogenicity of F. solani f. sp. pisi. The effect of glyphosate on pathogenicity of P. ultimum was not determined. Under field conditions, glyphosate probably would not affect pathogenicity or survival of either fungus.

Keywords

GlyphosateN-(phosphonomethyl)glycineInhibitionstimulationmyceliagrowthconidiaproduction
Type
Special Topics
Information
Weed Science , Volume 40 , Issue 3 , September 1992 , pp. 497 - 502
Copyright
Copyright © 1992 by the Weed Science Society of America 

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