SBCPD | Planta Daninha Haghnama K and Mennan H. Herbicide resistant barnyardgrass ISSN 0100-8358 (print) Planta Daninha 1806-9681 (online) Journal of The Brazilian Weed Science Society <http://www.sbcpd.org> Research Article Herbicide resistant barnyardgrass in Iran and Turkey Kianoosh Haghnamaa*, Husrev Mennanb a Plant Protection Organization of Golestan Province, Gorgan, Golestan, Iran; b Ondokuz Mayıs University of Samsun, Turkey. INFORMATION ARTICLE HIGHLIGHTS Received: August 10, 2019 No resistance to ACCase inhibitors was seen in barnyardgrass Accepted: July 2, 2020 biotypes collected from Iran One barnyardgrass biotype collected from Iran showed cross- Keywords: resistance to penoxsulam and bispyribac-sodium dose-response Several barnyardgrass biotypes from turkey showed resistance to both Echinochloa crus-galli ACCase and ALS inhibitors multiple-herbicide resistance rice *Corresponding author: ABSTRACT <
[email protected]> Background: Inconsistent control of Barnyardgrass has been reported repeatedly by farmers in major rice growing areas of Iran and Turkey. Cite this article: Objective: Thus, a greenhouse study was conducted to investigate the Haghnama K, Mennan H. Herbicide resistance of Barnyardgrass to acetyl CoA carboxylase (cyhalofop-butyl) resistant barnyardgrass in Iran and and acetolactate synthase (penoxsulam, bispyribac-sodium) inhibiting Turkey. Planta Daninha. herbicides. 2020;38:e020227592. Methods: The seeds were sown in pots in a greenhouse and after https://doi.org/10.1590/S0100-83582020380100060 screening, were sprayed with various rates of cyhalofop-butyl, penoxsulam and bispyribac-sodium herbicides at 3-4 leaf stage. Four weeks later, the Conflict of Interest: above ground biomass was cut, dried in an oven and weighted. The The authors declare that there is no results were then analyzed in the R software (drc package) using a four conflict of interest regarding the or three parameter log-logistic function.