اثر خصوصیات خاک و سابقه مصرف علفکش متریبوزین در کارایی این علفکش جهت کنترل علف هرز تاج خروس

This experiment was conducted to study the effect of soil characterstics and utilization history of
Metribozine on its efficiency to Amaranth control as factorial on the base of randomized complete blocks
design with three replications in green- house of plant pests and diseases research institute. The first factor
was soil type with six levels included of Hamedan with 15 years and without utilization history, Jiroft with
15 years and without utilization history, Isfahan; 2 years and Mashhad; 3 years and both of them with
utilization history and the second factor was different amounts of metrobozine from 0 to 1.5 fold rather than
recommended dozes. before cultivating, the pots with mentioned soils were treated with metrobozine and
harvesting was done four weeks after cultivating. Then, dry and wet weight percentage and the length of
shoot and root were measured and doze- reply curves were drawn. According to results, more Amaranth was
controlled due to increase of herbicide amounts. But the effects of metrobozine residue were decreased by
increase of amounts of clay, organic matter and utilization history. The highest and lowest damage to
Amaranth was observed in soils of Jiroft without utilization history and Hamedan with 15 years utilization
history, respectively.