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Rust-Infected Quackgrass (Elytrigia repens) Growth and Rhizome Bud Death after Glyphosate Application

Published online by Cambridge University Press:  12 June 2017

Russell W. Wallace  and
Robin R. Bellinder
Russell W. Wallace
Affiliation:
Dep. Fruit and Vegetable Sci., 134 Plant Sci. Bldg., Cornell Univ., Ithaca, NY 14853-0327
Robin R. Bellinder
Affiliation:
Dep. Fruit and Vegetable Sci., 134 Plant Sci. Bldg., Cornell Univ., Ithaca, NY 14853-0327
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Abstract

Photosynthesis decreased 32% in quackgrass infected with rust. Photoassimilate transport in rust-infected quackgrass, assessed by autoradiography, was less than that of control (no rust) leaves 35 min after exposure to 14CO2. Greenhouse-grown quackgrass height, foliar and rhizome dry weights, rhizome length, and bud numbers decreased 11, 25, 28, 19, and 21% in rust-infected plants, respectively, compared to control plants. Foliar and rhizome biomass decreased 31 and 39%, respectively, in field-grown rust-infected plants. Rhizome bud death 48 h after treatment (HAT) in both control and rust-infected plants increased as glyphosate rate increased from 0.13 to 1 kg ae ha−1; however, control plant bud death was significantly greater than that of rust-infected plants.

Keywords

Glyphosate, N-(phosphonomethyl)glycinequackgrass, Elytrigia repens (L.) Nevski. #3 AGRRErust, Puccinia coronata Corda. var. agropyronAgropyron repensElymus repensAGRREtranslocationrust fungi
Type
Special Topics
Information
Weed Science , Volume 41 , Issue 3 , September 1993 , pp. 501 - 507
Copyright
Copyright © 1993 by the Weed Science Society of America 

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