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Updated: Jun 23, 2026
10:52
Protocols for Robust Herbicide Resistance Testing in Different Weed Species
Published on: July 2, 2015
Are herbicide-resistant crops the answer to controlling Cuscuta?
Talia Nadler-Hassar1, Dale L Shaner, Scott Nissen
1Weed Science Lab, Biological Science and Pest Management, Colorado State University, Fort Collins, CO 80527, USA.
Pest Management Science
|April 18, 2009
Summary
Herbicide-resistant crops show promise for controlling parasitic weeds like Cuscuta. Combining crop resistance with specific herbicides offers effective parasitic plant management strategies.
Area of Science:
- Agricultural Science
- Plant Biology
- Weed Science
Background:
- Herbicide-resistant crop technology offers novel strategies for managing parasitic weeds.
- Oilseed rape (Brassica napus L.) genotypes resistant to herbicides were investigated for their impact on parasitic plants.
Purpose of the Study:
- To evaluate the efficacy of herbicide-resistant oilseed rape in controlling parasitic plants, specifically Cuscuta campestris.
- To determine the response of attached Cuscuta campestris to glyphosate, imazamox, and glufosinate.
Main Methods:
- Three herbicide-resistant oilseed rape genotypes were utilized.
- Cuscuta campestris was allowed to establish on oilseed rape before herbicide application.
- The response of attached and unattached Cuscuta species (C. campestris, C. subinclusa, C. gronovii) to herbicides was assessed.
Main Results:
- Unattached Cuscuta species exhibited resistance to imazamox and glyphosate, but sensitivity to glufosinate, suggesting universal resistance across species.
- Glufosinate had minimal effect on C. campestris attached to resistant oilseed rape.
- Imamox completely inhibited C. campestris growth on resistant hosts, while glyphosate initially inhibited but allowed parasite recovery.
Conclusions:
- Parasitic plant recovery is influenced by host-parasite interaction quality and host resistance mechanisms.
- Low host-parasite compatibility reduces parasite recovery.
- Integrated strategies using parasite-resistant crops and herbicide resistance show high potential for controlling Cuscuta species.
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