Study of the Effect of Rhizoctonia Solani (Kuhn) Root Rot Disease on the Growth and Yield of the Broad Bean Plant

This study was conducted with the aim of evaluating the efficiency of some bioand chemical factors individually or in combination with each other in reducing the effect of Rhizoctonia root rot disease. The most frequent fungi genera appeared in most samples with a percentage of 88.94%, followed by Fusarium spp with an appearance rate of 71.82%. The results of the pot experiment showed that isolate Rhizoctonia solani led to a decrease in the growth indicators of broad bean plant, which included the weight of the total vegetative and root, fresh and dry and the plant length of the cultivar. Barcelona when the control treatment was infected, which amounted to 29.26 g, 6.13 g, 6.20 g, 0.66 g, 36.00 cm, and for the local cultivar, it reached 25.43 g, 6.50 g, 6.30 g, 0.83 g, 32.66 cm, compared to the healthy control treatment for the Barcelona cultivar, which reached 51.60 g, 12.40 g and 11 40 g, 3.06 g, 50.00 cm, and for the local cultivar, they were 46.70 g, 12.10 g, 10.67 g, 2.83 g, and 48.32 cm, respectively. The yield indicators, which included the average number of pods and seeds per plant when the control treatment was infected with the cultivar Barcelona, amounted to 7.31. and 24.67 for the local cultivar, which amounted to 6.00 and 21.63, respectively, compared to the control treatment of Saleem for the Barcelona cultivar, which amounted to 16.00 and 56.13, and for the local cultivar, which amounted to 16.66 and 59.34, respectively. Gibberellin + pesticide had the highest increase in the percentage of these indicators.