Fungal endophytes isolated from healthy tissues allium
species: onion (allium cepa), garlic (allium sativum L.) and
leek (alium porrum) were screened in vitro for antagonism
against Fusarium oxysporum f.sp. cepae the causal pathogen
of basal rot disease in onion., among the twenty nine isolates
tested , three fungal isolates namely Chaetomium globosum ,
Stachybotrys chartarum and Trichothecium roseum were
selected to study the antagonistic effect against Fusarium
oxysporum. T. roseum was found to have the highest
percentage of inhibition of mycelial growth of Fusarium
oxysporum in vitro. (58.11%) followed by C. globosum (44
%) and S. chartarum (41.33%). The application of the tested
powder formulation of fungi to infested soil two weeks
before transplanting significantly reduced the incidence of
basal rot on Giza 6 onion cultivars. The use of these
bioagents in the form of powder formulations as soil
treatment could be recommended for the control of basal rot
in onion.