Effects of Chemical and Agronomical Weed Control Treatments on Weed Density, Yield and Yield Parameters of Lentil (Lens culinaris L. Cv. Erzurum-89)

摘要

This study was conducted in order to investigate the effects of 12 herbicide applications (linuron, prometryn, metribuzin, linuron+prometryn, prometryn+prometryn, metribuzin+prometryn, linuron+fluazifop-p-butyl, prometryn+fluazifop-p-butyl, metribuzin +fluazifop-p-butyl, linuron+quizalofbp-p-ethyl, prometryn+quizalofop-p-ethyl and metribuzin+quizalofop-p-ethyl) and hand weeding (once, twice and repeated) in comparison with a weedy control on yield and yield components of lentils (cv, Erzurum-89) in 20 00 and 2001 under Erzurum's dry conditions, Turkey. Data were collected on the density and dry weight of weed species, density of lentil, plant height, branch and pod number per plant, 1000-grain weight, seed yield, total biomass yield and harvest index in both years. Weed control applications significantly decreased intensity and dry weight of weeds and increased yield and all yield parameters compared with the unweeded control excepting 1000-grain weight, conesponding increases in yield by 48,3% (metr ibuzin+quizalofop-p-ethyl) and 74.5% (metribuzin+fluazifop-p-butyl) with significant benefits with chemical herbicides, Pre-emergence+post-emergence combinations, however, gave no clear advantages over single applications of linuron, prometryn and metrib uzin Metribuzin reduced plant stand in wetter conditions of the second year. In conclusion, linuron and prometryn were effective in controlling weeds on lentils without apparent toxic effects. Hand weeding once was also equally effective.