EVALUATION EFFICIENCY OF SOME BIOLOGICAL AGENTS AND CHEMICAL FUNGICIDES AGAINST Fusarium oxysporum f.sp. cucumerinum IN CUCUMBER PLANTS

Abstract

The study was conducted to evaluate of the efficiency of some biological agents and chemical fungicides to reduce disease incidence and disease severity of Fusarium wilt disease in cucumber, which caused by Fusarium oxysporum f.sp. cucumerinum under plastic house conditions. Results showed superiority treatments of biological agents Trichoderma viride, Trichoderma harzianum, bio-preparation Biohealth and bacterial preparation Fluramel (separately or in mixture). Treatments reduced disease incidence and disease severity, to 0 % , followed by Biohealth with Uniform in presence of pathogen 10 and 8.67% respectively ,and then the interaction between T. harzianum with Uniform in presence of pathogen 16.67 and 10.67% respectively, compared to control treatment ( only pathogen) where 86.67 and 68% respectively. In addition to the results showed biological agents superiority to improve plant growth and yield. Where superior treatment of Biohealth (alone) on the other treatments in the increase plant height, wet and dry weight and yield, where amounted to 394 cm/plant, 930.7 gm/Plant, 145.3 gm/ Plant and 4.333 kg/plant respectively, followed by treatment of Fluramel (alone) was record 385 cm/plant, 926.0 gm/Plant, 138.6 gm/ Plant and 4.067 kg/plant respectively, while control treatment ( only pathogen) where amounted to 231 cm/plant, 474 gm/Plant, 67.67 gm/Plant and 1.167 kg /plant respectively.