Identification of tolerance to metribuzin and imazethapyr herbicides in faba bean

Weeds cause serious constraint to faba bean (Vicia L.) productivity. Broad weed control is hampered by the availability of postemergence herbicides them, as current cultivars are highly susceptible them. Therefore, deployment herbicide tolerance desirable in bean. To address this, 130 accessions were screened for their response mature plants under field conditions recommended dosage two herbicides, metribuzin at 250 g a.i. ha?1 and imazethapyr 75 Marchouch Terbol stations. The recorded damage score (HDS) varied from 1 (no visual damage) 5 (full with death more than 50% plants) both locations. Low but significant (p < .01) positive correlation (+0.26) was obtained between HDS Both significantly delayed flowering maturity time occurrence, reduced plant height grain yield, increased number branches. Reduction index (RI) correlated positively station different seasons 2016–2017 seasons. Eleven tolerant identified further evaluated 1×, 1.5×, 2× dose herbicides. results indicated that harmful effect on yield reduction intensified 13.4 27.2% ?7.6 1.8% respectively 500 150 ha?1. Tolerance eight confirmed no yield.