The investigation of the resistance against diclofop – methyl herbicide in littleseed canarygrass (Phalaris minor)
2008
Elahifard, E., Department of Agronomy, Faculty of Agriculture, Ferdowsi University, Mashhad, Iran | RashedMohassel, M. H., Department of Agronomy, Faculty of Agriculture, Ferdowsi University, Mashhad, Iran | Nassiri Mahallati, M., Department of Agronomy, Faculty of Agriculture, Ferdowsi University, Mashhad, Iran | Zand, E., Department of Weed Research, Plant Protection Research Institute
In order to study the littleseed canarygrass (Phalaris minor) resistance to diclofop - methyl herbicide an experiment was conducted at Department of Weed Science, Plant Protection Research Institute greenhouse in 2004-2005. The type of design was completely randomized design, with four replications per treatment. Treatments included sixteen Phalaris populations treated with recommended dose of diclofop - methyl (900 gr ai/ha). In this experiment eight populations: GR13, KhR2, FR7, FR2, FR4, GR12, KhR5 and KhR3 that contain GR50 and LD50 more than 50%, showed resistancy when treated with recommended dose with diclofop - methyl. The rate of resistancy for above mentioned populations dry weight was 7.26, 8.11, 9.36, 11.18, 12.66, 16.77, 20.35 and 24.25, and for the number of survived plants was 8.65, 10, 10.82, 12.54, 14.15, 15.06, 16.14 and 20.32 respectively. Key words: Littleseed canarygrass (Phalaris minor), Diclofop - methyl, Resistance
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