First record of plond psyllium (Plantago ovats FORSK.) root rot and wilt diseases in Egypt [electronic resource].

Includes references.

Surveying the plantation areas of blond psyllium (plantago ovata), as a new remunerative medicinal crop grown during 2005/2006 and 200612007 winter seasons. showed that the wilt and root rot diseases were recorded for the first time in Egypt In the experimental area at Agronomy farm. plants showed symptoms of yellowing stunting and dried shoots, as well as xylem discoloration and a cortical root rot were noticed. Isolation trials yielded Fusarium incamatum, F. oxysporom, F. so/ani, Rhizoctonia so/ani and Sc/erotinla sclerotiorum. Pathogenicity tests indicated that all isolates were equal in their significant effects in pre-emergl)nce damping off symptoms. Where, F. Incamatum, F. oxysporum and F. soIani were the most virulent in post-emergence damping off, while R. solani and S. sclerotlorum were the last ones. From Trichoderma viride, T. harzianum, T. hamatum, Glioclsdlum virens, and G. rosum, T. viride and T. harzianum antagonized F. incamatum and showed the maximum significant inhibition effect. The radial growth of F. so/ani was highly affected by T. harzianum and G. vlrens. Besides, G. virens exhibited the highest reduction of Rhizoctonia so/anl growth. The antagonistic behavior of Trichodenna and Gliocladium species resulted from growth of antagonistic fungi over all psyllium pathogens. In pot experiment, the combined soil infestation with G. vtf8IJS and F. solanl recovered the highest percent of survival plants (75%) and maximized the plant height, number of leaves, spikes, fresh and dry weights plant". In general, the presence of antagonistic fungi reduces the deleterious effect of wilt causative pathogens on growth parameters of psyllium plants.

Summary in Arabic.

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