عزل و تشخيص الفطريات المصاحبة لشتلات أصناف الشليك و مقاومتها أحيائيا و كيميائيا

الملخص EN

Results of isolated fungi from seedlings of three Strawberry varieties Sweet Charlie, Hapil and Festival showed that the root zone in the three varieties contained the largest number of fungi.

The fungus F.

culmorum was the highest existence in three areas roots and runners and crown.

The isolation percentage was 66.15 % in the runners zone of Hapil and 36.15 % in the root of Sweet Charlie, while the existence percentage of the fungus above was 55.76 % in the crown area and 35.79 % in the root zone of Festival, while the fungi Cylindrocarpon spp.

appeared at 38.60 % in runners of sweet charlie and 35.91 in the root of Hapil, while fungus isolated from Festival in 23.60 % in root zone, and the lowest rate was in fungus A.

alternata in the root of sweet charlie with 2.32% and the fungus Phytophthora spp.

in Hapil.

In Festival fungi St.

herbarum appeared lowest ratio 3.47 % in the root, the different percentages for the isolation of the fungi differed with the differentiation of varieties studies of Strawberry plant and isolation areas.

The testing biological agent Trichoderma harzianum Indicates that his high efficiency against fungi F.

culmorum and Cylindrocarpon spp.

and Bipolaris spp.

its degree antagonistic to 2, 2 and 2 respectively.

Inhibition percentage was 88.88% and 87.77 % and 86 %, respectively, for three fungi.

For ability of bacterial biological agent Pseudomonas aeruginosa showed significant inhibition to the growth of three fungi.

The study of the bacterial biological agent and fungus Cylindrocarpon spp.

showed significant inhibition as well as bacterial biological agent and fungus Bipolaris spp.

with inhibition percentage 100% Finally the results showed that the fungicides Azadirachtin in concentration 5cm3/liter inhibited significantly the growth of three fungi, and the highest percentage inhibition was with the treatment of fungicides and fungi Cylindrocarpon spp.

with inhibition percentage 80 % while the lowest percentage of inhibition was 21.87 % in Fungi F.

culmorum.