Abstract

This study was conducted to evaluate the efficiency of seeds powder of some cruciferae plants and the biocontrol fungus Trichoderma harzianum in suppressing the pathogenic fungi under lab. And field conditions. The results showed that Seeds powder of some cruciferae plants in 2% significantly inhibited radial growth of fungal isolates AZ7, AZ4, AZ1, AZ6 and AZ5. The percentage of growth inhibition was 8.75, 57.87, 53.12, 56.25 and 57.87 respectively compared to 0% in control treatment. Results of the antagonistic ability test between the biocontrol fungus Trichoderma harzianum isolate and the pathogenic fungi AZ1-AZ5 and AZ8 isolates in the PSA culture medium, showed the superior of the biocontrol fungus isolates which gave high antagonistic that reached one degree with all the pathogenic fungi isolates. Results also showed that cabbage seed powder in 2% gave high efficiency in inhibiting of biocontrol fungus growth, the percentage of inhibition in its treatment was 88.8% compared with 0% in the control treatment. The efficiency of biological and chemical agents in protecting date palm offshoots from the infection by the two fungi Cylindrocarpon destructans AZ1 and Chalaropsis radicicola AZ4 under field condition were varied. Beltanol fungicide 1 ml/l reduced the disease severity to 41.6 and 31.3% as compared to 86.6 and 63.3% in the treatments of the two pathogenic fungi isolates AZ1 and AZ4 individually respectively. While they were 53.3 and 38.3% in T. harzianum treatment and 61.6 and 41.6% in cabbage powder treatment respectively. The combination of Beltanol and cabbage powder significantly reduced disease severity to 25% as compared with any other protecting treatments

The article was added to IASJ on 2015-04-13

145 Total full text downloads since the date of addition