نوع مقاله : مقاله پژوهشی
1 فارغ التحصیل کارشناسی ارشد بیماری شناسی گیاهی، گروه گیاه پزشکی، دانشگاه زنجان
2 استادیار، گروه گیاه پزشکی، دانشکده کشاورزی، دانشگاه زنجان
عنوان مقاله [English]
Fusarium root rot of bean is one of the important diseases of this plant all over the world. In order to identify Fusarium species associated with bean root rot disease in Zanjan province and their pathogenicity on bean seedlings, during growing season 2012, fifty isolates of Fusarium were obtained from roots of bean plants showing root rotand foliage yellowing or wilt symptoms. Based on cultural and morphological features by using available identification keys, seven species including F. solani, F. acuminatum, F. equiseti, F. oxysporum, F. crookwellense, F. sambucinum and F. semitectum were identified, among them F. solani was the most prevalent species. In order to compare virulence of the species, foliage disease severity and the length of necrosis lesion on root, were measured and compared among species. The effect of infection with different species on growth factors of plant consisting dried root and shoot weight, shoot and root length were also assayed. The analysis of variance showed that there was significant difference among species in terms of foliar disease severity and root lesion length. Also Pearson’s correlation analysis revealed a positive significant correlation between root lesion length and foliar disease severity.