EVALUATION THE EFFICIENCY OF TRICHODERMA HARZIANUM AND PSEUDOMONAS FLUORESCENS AND SOME FUNGICIDES OF CONTROLING FUSARIUM WILT DISEASE IN WATERMELON CAUSED BY FUSARIUM OXYSPORUM F.SP.NIVEUM.

	EVALUATION THE EFFICIENCY OF TRICHODERMA HARZIANUM AND PSEUDOMONAS FLUORESCENS AND SOME FUNGICIDES OF CONTROLING FUSARIUM WILT DISEASE IN WATERMELON CAUSED BY FUSARIUM OXYSPORUM F.SP.NIVEUM.
Euphrates Journal of Agriculture Science
Article 1, Volume 6, Issue 4, 2014, Pages 446-459
Abstract
Abstract : The results of this study indicated that fungusT.harzianum and P. fluorescens has high antagonism ability against the pathogenic fungus isolates causative fusarium wilt disease in watermelon under laboratory conditions.Bacteriacaused inhibition for growth of F.oxysporum (FO1,FO2,FO3,FO4) on PDA medium. The rate of inhibition was 66.6, 72.2, 66.6, 55.5 % respectively after 7 days of incubation. GELTANOL and DORADOfungicides were achieved inhibition rate of 100%, and 50-55.5% respectively . The results also showed that all control agents used have caused a significant increase in the percentage of watermelon germination of the seeds in the presenceof infected fungus. Treatment of aT.harzianum , P. fluorescens , GELTANOL and DORADO were caused increase percentage of germination to 87.5, 85.0, 95.0, 65.0% respectively. The results also showed that all the treatments used have achieved a significant reduction in the rate and severity of infection. The rate of infection was 41,42, 0.0, 51%, and the severity of infection was 18, 19, 0.0, 28% respectively, compared to the control treatment (F.oxysporum only)when it was 100%and 75.75% for the rate and severity of infection respectively.

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