Study the Effect of Some Microorganisms in Biocontrol of‏ ‏Fusarium Tomatoes Wilting (Fusarium oxysporum f.sp. ‎lycopersici) under Lab Conditions‎

Bachar Aldakil*(1)

(1). Department of Plant Protection, Faculty of Agriculture, Aleppo University, Aleppo, Syria.

(*Corresponding author: Dr. Bachar Aldakil. E-Mail:

Received: 15/12/2019                               Accepted: 6/01/2020


Tomato is one of the most important vegetable crops and it is infected with many pathogens, and the most important one is F. oxysporum f.sp. lycopersici. Biocontrol is one of the most important components of IPM. This research studied the effect of different bacterial isolates of Bacillus, Pseudomonas and different isolates of fungus Trichoderma harzianum to identify the most effective isolates in reducing the radial growth of vascular tomato wilt caused by the fungus Fusarium oxysporum f.sp. lycopersici. The experiment was carried out at Faculty of Agriculture Labs, Aleppo University, in 2012, according to complete randomized design CRD with 5 replicates for each isolate in addition to the control treatment. Measurements of the average diameter of the Fusarium colony was taken in each replication of the control area. The results showed significant differences between treatments when comparing the average colony diameter of different treatments with the control. The highest value was (8 cm) when using isolation PS3 while the lowest value when using isolation was (PS2 = 1.29 cm). T2, bas1 PS 3 and the control while there were no significant differences between PS, bas1, PS3, T2, T1, and bas1 and control treatment, which make it a promising method in controlling this pathogen.
Keywords: F.oxysporu f.sp.lycopersici, Biocontrol, Bacillus, Pseudomonas, Trichoderma harzianum.
Full paper in Arabic: PDF