تثبيط الفطر الممرض fusarium oxysporum f. sp. lycopersici المسبب لمرض ذبول بادرات الطماطم باستخدام بعض المستخلصات النباتية

الملخص EN

Two experiments was conducted at Plant Protection department laboratory of Faculty of Agricultural Sciences- University of Aden during 2008.The aim of the experiments is to study the efficiency of plant extracts of leaves Masqit plant(Prosopis juliflora)and Neem plant(Azadirachta indica ) in inhibition of the causal agent of tomato seedling wilt (Fusarium oxysporum f.

sp.

lycopersici) by adding the leaf extracts to the media (PDA) with four concentration (0,5,10 and 15%) after filtration with two methods before growing the fungus : • Partly filtration method .

• Complete filtration method.

Completely randomized design was used and the results was analyzed by using a statistical computer program Genstst-5 release 3.2 which compared the differences between the averages of the treatments tested at less significant of differences at the level of probability (0.05).The results indicated that all leaf extracts of Masqit and Neem was very effective in inhibiting the fungus growth significantly and decrease in colony diameter, the growth speed and increase of inhibition diameters for the fungus and inhibition percentage of pathogenic fungus Fusarium oxysporum f.

sp.

lycopersici with all concentrations and filtration methods .

The inhibition ability is due to effective materials in the leaf components of Masqit and Neem plants.