Isolation, Identification and Pathogenicity of Seed borne fungi of some barley cultivars

Volume 16 , Issue 1 , October 2014 , Pages 55-64

Authors

¹ Biology Dept. Coll. of Sci. Mosul University

² Biology Dept. Coll. of Sci. University of Koya

One hundred seeds were tested for each cultivars according to ISTA technique and

using agar plate method. The pathogenicity test was conducted to study the effect of 6

fungal pathogen on pre and post emergence damping off and survival damping off seedling

by inoculation of soil .Seven fungal genera Alternaria,Aureobasidium, Cladosporium,

Drechslera, Penicillium , Rhizoctonia and Stemphylium were isolated from Barley seeds

from Hawler governorate at season 2006. The Alternaria isolated at highest occurrence

percentage (%75.2),while the Stemphylium isolated record the lowest incidence percentage

(%0.1).Six fungal genera Alternaria, Aureobasidium, Cladosporium , Drechslera,

Rhizoctonia and Stemphylium were isolated from Barley seeds at the season of 2007. The

results obtained that the control significantly increases pre- emergence damping off

seedlings after 10 days of sowing of seeds, the mean value was (1.08) as compared with

fungal pathogen treatment which decreases their plant mean values obtained for

Alternaria,Aureobasidium, Curvularia, Drecslera, Stemphylium and Rhizoctonia were

recoded respectively .The ICARDA cultivar significantly affected which increased the post

damping off seedlings their value was (3.0476) as compare with other cultivars. The results

indicate that survival significantly increased their values were 7.833 as compared with

control 8.916.

Statistics