Greenhouse assay to investigate resistance of littleseed canary grass (Phalaris minor) to aryloxyphenoxy propionate herbicides

پژوهشهای زراعی ایران

Article 15, Volume 6, Issue 2 - Serial Number 12, 2008, Pages 353-362   

Document Type: Research Article

DOI: 10.22067/gsc.v6i2.2442

Authors

J Gherekhloo^{* 1}; M.H Rashed Mohasel²; M Nasiri mahalati¹; E Zand³; A Ghanbari¹; R Deperado⁴

¹Ferdowsi University of Mashhad

²Department of Agrotechnology, Ferdowsi University of Mashhad

³-

⁴University of Córdoba, Spain

Abstract

In order to evaluate resistance of Phalaris minor biotypes, sampled from wheat fields of Fars and Golestan provinces, to ACCase inhibiting herbicides, a dose-response study was conducted under controlled conditions in greenhouse of Ferdwosi University of Mashhad. The results indicated that AR, SR3, MR4, FR2, FR4, and FR8 populations of Fars and GR2-1 biotype from Golestan have been resistant to diclofop-methlyl. Different levels of resistance maybe are because of involving different mechanisms in studied populations. AR, SR3, and MR4 showed a cross-resistance to the applied herbicides. These biotypes indicated a 5- to 11-fold and a 7- to 8-fold increase in resistance to diclofop-methlyl and clodinafop-propargyl, respectively compared with the susceptible biotype. Among these biotypes, SR3 showed the highest resistance to both herbicides.

Key words: Phalaris minor, herbicide resistance and ACCase inhibitor.