Résumé:
The aim of this study is to clarify the effect of the treatment with Trichoderma harzianum filtrate
on vitality of some hard wheat seeds and on their interior associated fungi. Three samples of
hard wheat seeds (Triticum durum Desf) were brought from Oum-elbouaghi (Algeria) silos
yields, follower for varieties: Vitron, Waha, and GTA.Seed treatment with Trichoderma
harzianum filtrate showed: 1-An increase in the proportion of seed germination in Waha and in
GTA with ratios equal to: 0.47% and 05.56% in two cultivars respectively, compared to untreated
seeds (controls).Moreover, improvement in growth and strength of seedlings were clearly
evident in three treated cultivars compared to untreated seeds (control), where those which their
growth was low, and some deformation and anomalies were clearly evident.
2- A strong decrease in the interior associated fungi numbers, with ratios equal to: 74.074%,
79.166%, and 93.75% in: Vitron, GTA, and Waha respectively, compared with untreated seeds
(controls)
