Assessment of two nondestructive assays for detecting glyphosate resistance in horseweed (Conyza canadensis)

@inproceedings{Koger2005AssessmentOT,
  title={Assessment of two nondestructive assays for detecting glyphosate resistance in horseweed (Conyza canadensis)},
  author={Clifford H. Koger and Dale L. Shaner and W. B. Henry and Talia Nadler-Hassar and Walter Edward Thomas and John W. Wilcut},
  booktitle={Weed Science},
  year={2005}
}
Abstract Two rapid, nondestructive assays were developed and tested for their potential in differentiating glyphosate-resistant from glyphosate-susceptible biotypes of horseweed. In one assay, leaves of glyphosate-resistant and -susceptible corn, cotton, and soybean plants, as well as glyphosate-resistant and -susceptible horseweed plants, were dipped in solutions of 0, 300, 600, and 1,200 mg ae L−1 glyphosate for 3 d, and subsequent injury was evaluated. In the second assay, plant sensitivity… 
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TLDR
The results suggest that a simple bioassay can be used to screen biotypes for suspected resistance and that reduced translocation of glyphosate plays a major role in glyphosate resistance in R biotypes of horseweed.
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