ارزيابي خواص قارچ كشي عصاره برخي از اندامهاي گياهي

Evaluation of fungicidal properties on some plant organs extract

The present study was carried out to evaluate the potential fungicidal properties of seeds, roots, stem and levaves of several plant species such as: Peganeum harmlala, Nigella sativa, Satureja hortensis, Sesamum indicum, Trachystermum copticur, Uninum sp., Deserunia sophia, Spinacia oleracea, Coriandrum sativurn, Anethum cyntbacarpum, Gosipyum hirsurum, Alium porrurn and Teverium polium under laboratory conditions. Four species of soil borne fungi, including Fusarium graminearum, Fusarium equisets, Pythium aphanidermatum and Rhizoctonia solani were also used in this investigation, The inhibition was assessed by measuring fungal colony diameters at 20°C on PDA after 24, 48, 72 and 96 periods. Another experiment was also carried out with T.copticum seed extract and wheat seedlings in a green house. In addition, the effects of time duration and autoclaving on T. cop tit-um seed extracts were also investigated. The results of this experiment revealed that only T. copticum seed extract could inhibit the fungal growth completely, the rest showed various degree of fungicidal activities and some like cotton even had stimulating effect on germination and growth of the fungi. Unlike seeds, the extract of the above ground plant parts. roots, time duration and autoclaving had no significant effect on the fungal growth. In green house, T. eopticurn extract caused considerable reduction in the percentage of the infected wheat seedlings.