The effect of some systemic fungicids against Barley loose smut

Barley (Hordeum vulgar) is one of the most important strategical world's agricultural products which stand in the 4th position after wheat, soya and corn, Barley, also attact with several diseases out of which, true loose smut is one of the most important one, which causing qualitative and quantitative losses. Various management strategies are taken into considerations to control the disease. One of the economical methods to manage the diseases is the application of general systemic fungicides. In this study, we evaluated some systemic fungicides including carboxin thiram (Dividend star ®, %75 wp), triadimenol (Baytan®, %7.5 wp), diniconazol (Somi8®, wp), triniconazol (Real®, FS), repectively in various dosage levels of 2, 2, 1/5 and. /2, in comparison with a newer fungicid Dividend star® 036 (FS) also, in various dosage levels, which was taken into studies on a Barley cultivar "Karun dar Kavir" (Nosrat).The experiment was carried out in a Rendomized Block Design (RBD) with the above fungicides in various dosage in 10 treatments in the field conditions at the years of 2006 -2007. The results showed that, the fungicides Dividend® (2ml/lit), Somi8® (2gr/lit), Real® (0.02ml/lit) and Baytan® (1.5 gr/lit) were the most efficient fungicides in the disease control repectively. Carboxy thiram (2gr/lit) and Dividend® (1ml/lit) were the least concerned on the disease control in comparison to other fungicides, including the control.