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the claim

Roundup herbicide effectively kills targeted weed species

the verdict
SUPPORTED
the evidence backs this
Recorded sources
5 sources for · 2 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that Roundup herbicide effectively kills targeted weed species?

Yes. Evidence strongly supports the claim that Roundup (glyphosate) effectively kills targeted weed species, as demonstrated across numerous agricultural studies and field applications. While the emergence of glyphosate-resistant weed populations in recent years highlights limitations and the need for integrated management, the herbicide remains highly effective against a broad spectrum of susceptible weed species.

Verdict: SUPPORTED · 5 sources for, 2 against · Last checked

The analysis

The retrieved literature contains numerous studies demonstrating that glyphosate effectively controls and kills a wide range of targeted weed species in various crops. While papers [1] and [2] document the evolution of resistance in certain specific weed populations (waterhemp and ryegrass), the overwhelming majority of empirical studies (such as [0], [4], [6], [7], and [9]) confirm its high efficacy in killing targeted weeds. The emergence of resistance does not invalidate the general effectiveness of the herbicide on susceptible populations, though it indicates that effectiveness is now bounded by resistance management concerns. Thus, the verdict is SUPPORTED.

Evidence for · 5
Herbicide-Resistant Crops: Utilities and Limitations for Herbicide-Resistant Weed Management
2010
The paper confirms the high initial efficacy of glyphosate in managing weeds within genetically modified crops.
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Green, J. M. & Owen, M. (2010). Herbicide-Resistant Crops: Utilities and Limitations for Herbicide-Resistant Weed Management. doi.org. https://doi.org/10.1021/jf101286h

Evidence against · 2
Glyphosate and Multiple Herbicide Resistance in Common Waterhemp (<i>Amaranthus rudis)</i>Populations from Missouri
2008
The study documents field populations of waterhemp that have developed significant resistance to glyphosate, surviving high application rates.
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Legleiter, T. R. & Bradley, K. W. (2008). Glyphosate and Multiple Herbicide Resistance in Common Waterhemp (<i>Amaranthus rudis)</i>Populations from Missouri. doi.org. https://doi.org/10.1614/ws-07-204.1

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More for · 4
Key Aspects on the Biology, Ecology and Impacts of Johnsongrass [Sorghum halepense (L.) Pers] and the Role of Glyphosate and Non-Chemical Alternative Practices for the Management of This Weed in Europe
2019
The review highlights the important and effective role of field trials using glyphosate to control weeds in arable and perennial crops.
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Travlos, I., Montull, J. M., Kukorelli, G., Malidža, G., Doğan, M., Cheimona, N., Antonopoulos, N., Kanatas, P., Zannopoulos, S., & Peteinatos, G. (2019). Key Aspects on the Biology, Ecology and Impacts of Johnsongrass [Sorghum halepense (L.) Pers] and the Role of Glyphosate and Non-Chemical Alternative Practices for the Management of This Weed in Europe. doi.org. https://doi.org/10.3390/agronomy9110717

Effectiveness of Glyphosate in Broomrape (<i>Orobanche</i>spp.) Control in Four Crops
1980
The study demonstrates that glyphosate was highly effective in controlling Orobanche weed species across four crops.
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Jacobsohn, R. & Kelman, Y. (1980). Effectiveness of Glyphosate in Broomrape (<i>Orobanche</i>spp.) Control in Four Crops. doi.org. https://doi.org/10.1017/s0043174500061543

Weed Control in Glyphosate-Resistant Corn as Affected by Preemergence Herbicide and Timing of Postemergence Herbicide Application
2006
The field studies show that glyphosate successfully controlled common weed species like lambsquarters, ragweed, and Palmer amaranth by at least 94%.
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Parker, R. G., York, A. C., & Jordan, D. L. (2006). Weed Control in Glyphosate-Resistant Corn as Affected by Preemergence Herbicide and Timing of Postemergence Herbicide Application. doi.org. https://doi.org/10.1614/wt-04-288r.1

Evaluation of Weed Control Efficacy and Seed Cotton Yield in Glyphosate Tolerant Transgenic Cotton
2013
The research demonstrates that post-emergence application of glyphosate effectively registered lower weed density and higher weed control efficiency in transgenic cotton hybrids.
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Chinnusamy, N., Chinnagounder, C., & Krishnan, P. (2013). Evaluation of Weed Control Efficacy and Seed Cotton Yield in Glyphosate Tolerant Transgenic Cotton. doi.org. https://doi.org/10.4236/AJPS.2013.46142

More against · 1
Multiple herbicide resistance in a glyphosate-resistant rigid ryegrass (<i>Lolium rigidum</i>) population
2004
The research confirms the existence of a rigid ryegrass population with confirmed resistance and inadequate control from normal field rates of glyphosate.
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Neve, P., Sadler, J., & Powles, S. B. (2004). Multiple herbicide resistance in a glyphosate-resistant rigid ryegrass (<i>Lolium rigidum</i>) population. doi.org. https://doi.org/10.1614/ws-04-007r1

Receipt History
first checked05 Aug 2026
judged → SUPPORTED · 4905 Aug 2026
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