Caio Brunharo
Assistant Professor of Weed Science
-
118 ASI
University Park, PA - He/Him
- brunharo@psu.edu
- 814-865-9552
Research Summary
Weed adaptation to agricultural practices and climate change; Weed biology, ecology, and evolution; Abiotic stress; Herbicide resistance.
Huck Affiliations
Links
Most Recent Publications
EPSPS Gene Amplification Confers Glyphosate Resistance in Palmer Amaranth in Connecticut
Jatinder Aulakh, Vipan Kumar, Caio Brunharo, Ernesto Zarate, Andrew Price, Weed Technology on p. 1-7
Response of Horseweed (Erigeron canadensis) from New York Vineyards and Orchards to Paraquat and Diquat
Bethany M. Schulteis, Ivana Santos Moisinho, Aleah Butler-Jones, Thierry E. Besançon, Caio Brunharo, Lynn M. Sosnoskie, 2025, Hortscience: A Publication of the American Society for Hortcultural Science on p. 554-562
Monitoring the distribution of herbicide-resistant Amaranthus spp. in Pennsylvania.
Ivana Moisinho, Caio Brunharo, 2025, Proceedings of the Northeastern Weed Science Society Annual Meeting
Amaranthus palmeri S. Watson reproduction system: Implications for distribution and management strategies
Ednaldo A. Borgato, Sara Ohadi, Caio A.C.G. Brunharo, Eric L. Patterson, Maor Matzrafi, 2025, Weed Research
Symposium Welcome
Caio Brunharo, Rolabd Beffa, 2025, Proceedings of the Weed Science Society of America Annual Meeting
Multiple origins or widespread gene flow in agricultural fields? Regional population genomics of herbicide resistance in Bromus tectorum.
Victor Ribeiro, Joe Gallagher, Carol Mallory-Smith, Judit Barroso, Caio Brunharo, 2025, Molecular Ecology on p. e17791
Glyphosate resistance characterization in Lolium multiflorum from New York
Adrian Veron, Vipan Kumar, Caio Brunharo, 2025, Proceedings of the Northeastern Weed Science Society Annual Meeting
Planting green effects on surface and subsurface atrazine runoff.
Noelle Connors, Caio Brunharo, Heather Karsten, Louis Saporito, John Wallace, 2025, Proceedings of the Weed Science Society of America Annual Meeting
Symposium discussion
Caio Brunharo, Roland Beffa, 2025,
Evolutionary origins and spread of herbicide resistance in downy brome (Bromus tectorum) in Oregon.
Victor Ribeiro, Joe Gallagher, Carol Mallory-Smith, Caio Brunharo, 2025, Proceedings of the Weed Science Society of America Annual Meeting
Most-Cited Papers
Role of Glutamine Synthetase Isogenes and Herbicide Metabolism in the Mechanism of Resistance to Glufosinate in Lolium perenne L. spp. multiflorum Biotypes from Oregon
Caio A.C.G. Brunharo, Hudson K. Takano, Carol A. Mallory-Smith, Franck E. Dayan, Bradley D. Hanson, 2019, Journal of Agricultural and Food Chemistry on p. 8431-8440
Confirmation and mechanism of glyphosate resistance in tall windmill grass (Chloris elata) from Brazil
Caio Acg Brunharo, Eric Patterson, Daniela Carrijo, Marcel de Melo, Marcelo Nicolai, Todd Gaines, Scott Nissen, Pedro Christoffoleti, 2016, Pest Management Science on p. 1758-1764
Review: evolutionary drivers of agricultural adaptation in Lolium spp.
Maor Matzrafi, Christopher Preston, Caio Augusto Brunharo, 2021, Pest Management Science on p. 2209-2218
Non-target-Site Resistance in Lolium spp. Globally: A Review
Andréia K. Suzukawa, Lucas K. Bobadilla, Carol Mallory-Smith, Caio A.C.G. Brunharo, 2021, Frontiers in Plant Science
Vacuolar sequestration of paraquat is involved in the resistance mechanism in lolium perenne L. Spp. multiflorum
Caio A.C.G. Brunharo, Bradley D. Hanson, 2017, Frontiers in Plant Science
Increased temperatures and elevated CO <sub>2</sub> levels reduce the sensitivity of Conyza canadensis and Chenopodium album to glyphosate
Maor Matzrafi, Caio Brunharo, Parsa Tehranchian, Bradley D. Hanson, Marie Jasieniuk, 2019, Scientific Reports
Multiple Herbicide-Resistant Italian Ryegrass [Lolium perenne L. spp. multiflorum (Lam.) Husnot] in California Perennial Crops: Characterization, Mechanism of Resistance, and Chemical Management
Caio A.C.G. Brunharo, Bradley D. Hanson, 2018, Weed Science on p. 696-701
EPSPS duplication and mutation involved in glyphosate resistance in the allotetraploid weed species Poa annua L.
Caio Augusto De Castro Grossi Brunharo, Sarah Morran, Katie Martin, Marcelo L. Moretti, Bradley D. Hanson, 2019, Pest Management Science on p. 1663-1670
Population genomics of Digitaria insularis from soybean areas in Brazil
Acácio Gonçalves Netto, Erick M.G. Cordeiro, Marcelo Nicolai, Saul J.P. de Carvalho, Ramiro Fernando Lopez Ovejero, Caio A.C.G. Brunharo, Maria I. Zucchi, Pedro J. Christoffoleti, 2021, Pest Management Science on p. 5375-5381
Western United States and Canada perspective: are herbicide-resistant crops the solution to herbicide-resistant weeds?
Caio A.C.G. Brunharo, Roger Gast, Vipan Kumar, Carol A. Mallory-Smith, Breanne D. Tidemann, Hugh J. Beckie, 2022, Weed Science on p. 272-286
News Articles Featuring Caio Brunharo
Jul 24, 2025
Multistate study targets herbicide-resistant weeds in soybeans
The United Soybean Board has awarded $500,000 to a multistate research team, led by Michigan State University and including Penn State, to develop rapid diagnostic tools for detecting herbicide-resistant weeds in soybean fields.
Full Article
Jun 23, 2025
Multistate herbicide-resistant weeds study aims to protect soybean crops
New grant will fund development of rapid testing to detect herbicide-resistant weeds in soybean fields; to gain a better understanding of plant mechanisms that contribute to resistance.
Full Article
Oct 11, 2024
Penn State researchers earn funding for sustainable weed and insect management
Three Penn State research teams have received awards totaling $1.78 million from the U.S. Department of Agriculture's National Institute of Food and Agriculture to investigate climate-smart approaches to pest control in agriculture.
Full Article
Sep 24, 2024
$1M USDA grant to perfect weed killing method in organic crop production
The U.S. Department of Agriculture (USDA) has awarded a four-year, $1 million grant to a team led by plant scientists and an economist from Penn State to investigate anaerobic soil disinfestation to support transitioning from conventional to organic production systems.
Full Article