Evaluation of efficacy of Salicylic acid ,and the chemofungicide Beltanol and the biological fungus Trichoderma harzianum in controlling the fungus Rhizoctonia solani isolated from Broadbean plant roots infected with the root rot disease

Abstract

    This study was conducted to see the effect of each of the pesticide chemical Beltanol factor induction Salicylic acid and fungus resistance biogenic Trichoderma harzianum on the pathogenic fungus Rhizoctonia solani and its impact on the severity of injury root plants beans and some growth indicators of dry weight and the length of shoot and root,The results of laboratory tests showed that the fungus T. harzianum led to the inhibition of the growth of pathogenic fungus R.solani the middle PDA as the results showed that the use of the pesticide Beltanol concentration of 1 ml to prevent the growth of pathogenic fungus R. solani entirely on the middle either wooden canopy, the results showed after 30 days of agriculture that the treatment of pesticide Beltanol achieved the highest rate of decrease in the severity of the injury Blaftr pathogen R.solani as 25%, followed by treatment using Salicylic acid which rate the severity of the injury which 31.25% Then the treatment of fungus T. harzianum that the severity of the injury rate was 43.75% compared to the treatment of pathogenic fungus R.solani alone, which amounted to the severity of injury, where 93.75% of all transactions that achieve significant reduction in the severity of the injury fungus R.solani has reflected positively on the growth indicators studied on bean plants achieved all transactions lifted morale in the rate of dry weight and the length of the two totals shoot and root as it occupied the treatment of pesticide Beltanol ranked first in raising growth indicators as total dry weight of grouped shoot and root where 1.05 and 0.72 g, respectively, and achieved the highest lengths of grouped shoot and root, amounting to 11.5 and 9.75 cm, respectively, compared to the treatment of pathogenic fungus R.solani alone and followed the treatment pesticide use Beltanol treatment Salicylic acid treatment and then add fungus T.harzianum.