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Glyphosate Absorption and Translocation in Rust-Infected Quackgrass (Elytrigia repens)

  • Russell W. Wallace (a1) and Robin R. Bellinder (a1)

Abstract

Puccinia coronata infection increased absorption of 14C-glyphosate in quackgrass 3 days after inoculation (DAI) when compared to 0,6,9, or 12 DAI. Days after inoculation had no effect on glyphosate translocation out of treated leaves until 9 to 12 DAI when 89% of the absorbed 14C-glyphosate was retained within the infected leaf. In contrast, only 43% was retained in leaves treated at 0 DAI. In other studies, 14C-glyphosate absorption increased linearly from 21 to 35% 12 to 96h after treatment (HAT). Differences between control and rust-infected plants were not significant. Sixty-three percent of absorbed 14C-glyphosate translocated out of control leaves by 96 HAT, while only 10% translocated out of rust-infected leaves. Additionally, 28 and 4% of the 14C absorbed was recovered from the rhizomes of control and rust-infected plants, respectively.

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Keywords

Glyphosate Absorption and Translocation in Rust-Infected Quackgrass (Elytrigia repens)

  • Russell W. Wallace (a1) and Robin R. Bellinder (a1)

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