تأثير راشحي الفطرين Aspergillus niger و Trichoderma harzianum و خليطهما في حيوية الفطر Fusarium oxysporum f. sp. lycopersici و في نمو بادرات الطماطة

الملخص EN

The results showed that the A.niger , T.harzianum , A.niger + T.harzianum exudates inhibited the radial’s growth and reduced the spores density of Fusarium oxysporum f.sp.

lycopersici .

More growth inhibition on the radial growth of the of Fusarium oxysporum f.sp.

lycopersici when the concentration , quantity of crude exudates and incubation period of bioagentes fungi were increased .

The combination of 20% concentration and 3 ml quantity of exudates inhabited the radial growth F.

oxysporum f.sp.

lycopersici at incubation 10, 20 days to 1.33,0.83 cm respectively compared with 2.4 cm in control treatment and spore density 3.60, 0.23×106 respectively also compared with 8.40, 8.43×106 and the chlamydospores had been increased .The results showed that the T.harzianum exudates in the soil was protected the seedling from infection by F.oxysporum so the healthy seedlings percentage was 86.85% followed by 82.45% in A.niger treatment compared with 75.35% in treatment soil by P.D.B.

as control treatment