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

Document Type : Research Article

Authors

J Gherekhloo ¹

M.H Rashed Mohasel ²

M Nasiri mahalati ¹

E Zand ³

A Ghanbari ¹

R Deperado ⁴

¹ Ferdowsi University of Mashhad

² Department of Agrotechnology, Ferdowsi University of Mashhad

³ -

⁴ University of Córdoba, Spain

10.22067/gsc.v6i2.2442

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.

20.1001.1.20081472.1387.6.2.15.8

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