Root-rot and Stem-canker Control in Faba Bean Plants by Using Some Biofertilizers Agents

Abstract

Some biofertilizers agents i.e. Rhizobium leguminosarum var. fabae, Bacillus megaterium var., phosphaticum and Trichoderma harizianum play important roles in enhancing the plant growth and controlling several diseases i. e. root rot and stem canker disease. In this work, under greenhouse conditions, Rhizoctonia solani caused dampingoff and death of all faba bean seedlings, however the three tested microorganisms resulted good biocontol role against the pathogenic fungus and the application of T. harizianum gave the best result in this trend. The treatment of T. harizianum and R. leguminosarum var. fabae to the soil infested with Rhizoctonia solani showed significant increase in leaves number of faba bean plants compared with the untreated plants or which treated plants or which treated with Bacillus megaterium var., phosphaticum after 40 days from planting. Application of T. harizianum and R. leguminosarum var. fabae gave the best plant growth while the presence of the pathogenic fungus showed significant decrease in fresh weight, dry weight and nodules number on roots of faba bean plants. Also, polyphenols and antioxidants contents in the shoots and roots were decreased in the presence of the pathogen compared with the untreated plants. Application of R. leguminosarum resulted significant increase in the roots and shoots total nitrogen and protein.

Journal of Plant Protection Research

“…pod fresh and dry weights, seed number, seed weight and ash pod weight. These results are agreement with those obtained by Farfour and Al-Saman (2014). They suggested that application of T. harzianum enhanced the plant growth of faba bean and controlled root rot disease caused by R. solani in greenhouses.…”

Role of Elemental Sulfur and Copper Oxychloride against Damping- Off Disease of Faba Bean Caused by Fusarium solani.

“…Faba bean seeds Giza 3 were inoculated with R. leguminosarum at the rate of 10 g / kg -1 seed before planting by immersing them in a sugar solution at a concentration of 20% where it was used as an adhesive substance. The treated seeds of peat pollen were coated with 16% gum arabic as an adhesive agent and left for 30 minutes in the shade Until completely dry according to Farfour and Al-Saman, (2014). Six faba bean seeds were planted in each pot, and five pots were identified as duplicates for each transaction in a completely random template design.…”

“…The inoculation of legumes with rhizobia and the effect of this on the growth of these crops have been known for a long time since it has been used to a large extent in agriculture to improve crops due to its ability to fix nitrogen (Chen et al, 2018). Rhizobium symbiosis with legumes produces 50% of 175 million tons of total biological N2 fixation annually worldwide (Roughley, et al, 1983;Shaban and Bramawy, 2011;Farfour andAl-Saman, 2014, Yadav andVerma, 2014;Ouma et al, 2016;Chen et al, 2018). Rhizobia can also serve as biological control agents of some plant pathogens in legume and non-legume plants (Antoun and Prévost, 2005;Kumawat et al, 2021).…”