عامل بيماري بادزدگي سنبله گندم از استان گلستان FUSAYIUM اثر دو نوع كود ازته بر روي رشد و توليد اسپور قارچ و به هم كنش آن با دو گونه

Effect of nitrogen fertilizer on growth and spore production of Trichoderma koningii and its interaction with two species of Fusarium causal agent of wheat head-blight isolated in Golestan province

The effect of urea nitrogen fertilizer and sodium nitrate on the growth of fungus Trichoderma koningii compared with two species of Fusarium culmorum and F. graminearum causal agent of wheat head-blight disease. En this investigation various parameters such as comparison of the colony growth, spore production and chlamydospore in a single and dual cultures studied. En addition, the effects of urea nitrogen and sodium nitrate on the fungal colony growth were measured by colony diameters in single and dual cultures. Mycelia( colony growth rate of Trichoderma under effect of urea fertilizer in 1g/l and 2g/E was significantly increased when compared with two species of F. culmorum and F.graminearum. But this growth rate in nitrogen condition significantly decreased by Trichoderma, when compared with control. While both species of Fusarium in the above condition showed significantly (P