Evaluation of performance and stability of new sources for tolerance to post-emergence herbicides in lentil (

Context Yield losses in lentil (Lens culinaris ssp. Medik.) caused by weeds are estimated at 20–80%. In the absence of effective broad-spectrum herbicides, menace weed has emerged as a serious yield constraint lentil. Aims Identification tolerance to two post-emergence imazethapyr and metribuzin. Methods 221 accessions were screened experimental research station International Center for Agricultural Research Dry Areas, Terbol (Lebanon) over four crop seasons (2014/15–2018/19). During 2014/15 season, preliminary screening experiment was conducted with an alpha lattice design replications, where treated pre-flowering stage 150% recommended dose (112.5 g active ingredient/ha) or metribuzin (315 ingredient/ha). Based on results, 38 selected further evaluation. subsequent testing, 100% doses Key results Herbicide treatments delayed flowering time maturation tested accessions. The plant height tolerant reduced 15% 8% plots metribuzin, respectively. Reduction index (RIsy) tool select herbicide tolerance. Stability analysis indicated that (IG4400 IG5722) performed under high rainfall environments while other (IG323 IG4605) adapted low environments. Conclusions Four (IG323, IG5722, IG4400, identified independently imazethapyr. Implications herbicide-tolerant can be used develop cultivars.