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Glufosinate reduces fungal diseases in transgenic glufosinate-resistant bentgrasses (Agrostis spp.)

Published online by Cambridge University Press:  20 January 2017

Yuexia Wang
Affiliation:
Department of Plant Sciences, University of Rhode Island, Kingston, RI 02881
Marsha Browning
Affiliation:
Department of Plant Sciences, University of Rhode Island, Kingston, RI 02881
Bridget A. Ruemmele
Affiliation:
Department of Plant Sciences, University of Rhode Island, Kingston, RI 02881
Joel M. Chandlee
Affiliation:
Department of Plant Sciences, University of Rhode Island, Kingston, RI 02881
Albert P. Kausch
Affiliation:
Department of Plant Sciences, University of Rhode Island, Kingston, RI 02881

Abstract

Glufosinate-resistant transgenic creeping and velvet bentgrass plants expressing a bar gene under the control of the maize ubiquitin promoter were inoculated separately with the fungal pathogens, Rhizoctonia solani and Sclerotinia homoeocarpa, before or after treatment with 560 mg L−1 of glufosinate at a rate of 0.56 kg ha−1. Application of the herbicide 3 h before or 1 d after fungal inoculation significantly reduced infection of these transgenic grasses by R. solani and S. homoeocarpa. Assessment of the in vitro antifungal activity of the herbicide showed that 336 and 448 mg L−1 glufosinate completely inhibited the mycelial growth of S. homoeocarpa and R. solani, respectively. The results suggest that the nonselective herbicide glufosinate may also be used to suppress the activity of some fungal pathogens in turf composed of these transgenic glufosinate-resistant creeping and velvet bentgrasses.

Type
Research Article
Copyright
Copyright © Weed Science Society of America 

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