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Plants, Pests, and Pathogens  

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Glyphosate: Can we separate fact and fiction? And, how do we control weeds without it? 
Watch the recording on YouTube: https://youtu.be/cdqf0Cj6t0E


Glyphosate is the most widely used postemergence herbicide in landscape plantings and is the active ingredient in many herbicides available to consumers. It controls annuals and perennials, grasses, and broadleaf weeds with little or no soil residual activity, yet many property managers are under pressure to find alternatives. While several alternative herbicides are available, none will substitute completely for glyphosate. In this presentation, Dr. Neal will discuss the controversies surrounding glyphosate toxicology as well as alternative products available, their properties, uses, and limitations.


Presented by Dr. Joe Neal, Professor of Weed Science and Extension Specialist,

NC State Department of Horticultural Science

More Glyphosate Information

Learn more about Glyphosate:

Links to Glyphosate studies shared in the webinar (many thanks to Dr. Grieger for sharing these!):

· Fate of glyphosate in soil and the possibility of leaching to ground and surface waters: a review

· Overviewof EPA and IARC genotoxicity of glyphosate-based herbicides      

· 2020paper on impact of glyphosate on soil microbiome –  they did not find any impacts but it looks like there are conflicting findings across other studies       

· USGS Herbicide Glyphosate Prevalence in Streams and Rivers – 2020 report

Learn more about weed management:

· Joe Neal’s Weed Management Extension Portal:  https://weeds.ces.ncsu.edu

· NC State Extension fact sheets on weed management in landscapes:  https://weeds.ces.ncsu.edu/publications

· Specific weed management fact sheets mentioned:

Florida Betony

Japanese Stiltgrass

· For turf weed management fact sheets, visit https://www.turffiles.ncsu.edu/weeds-in-turf

Also of interest:

· For a deeper discussion of herbicide injury caused by drift, volatilization, and carry-over in hay/manure/compost watch the June Plants, Pests and Pathogens recording – this link will take you directly to the herbicide injury discussion 

· NC State Extension fact sheet – Herbicide Carryover in Compost, Hay, Manure, and Grass Clippings

· NC State Apiculture Program webinar – Pesticides and Honeybees: Recent Research at NC State University – thanks to Charles Flowers for sharing this!

Slide comparing acute toxicity of glyphosate and alternative products. Click here.