بررسی اثر شوری آب بر کارایی علف‌کش گلایفوسیت در کنترل علف جارو (Kochia scoparia L.)

In order to Study of glyphosate efficacy in control of Kochia (Kochia scoparia L.) under salinity water conditions, an experiment was conducted as a factorial experimental based on randomized complete block design with three replications at Research Greenhouse in Faculty of Agriculture, Ferdowsi University of Mashhad. Experimental treatments included of water salinity in 4 levels 0, 50, 100 and 150 mM and herbicide doses in 7 levels 0, 50, 75, 100, 150, 200 and 250 percentage of effective dose. Traits of percentage of survival, fresh weight and dry matter were measured four weeks after spraying. According of the results of dose – response experiment, the dose required to 90 % reduce survival was 753.83 g ai ha which was chosen as effective dose. The results showed that with increasing salinity level, survival was significantly reduced; whereas water salinity wasn’t significantly effect on fresh weight and dry matter. With increasing doses of glyphosate, survival percentage, fresh weight and dry matter reduced very significantly, but the interaction between water salinity and concentrations of glyphosate on measured traits were not significant.