Integration of chitosan and plant growth-promoting rhizobacteria to control Papaya ringspot virus and Tomato chlorotic spot virus |
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| Authors: | Osama A Abdalla Shagufta Bibi |
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| Institution: | 1. Tropical Research and Education Center, Department of Plant Pathology, University of Florida, IFAS, Homestead, FL, USA;2. Faculty of Agriculture, Department of Plant Pathology, Assiut University, Assiut, Egypt;3. Department of Plant Pathology, PMAS Arid Agriculture University, Rawalpindi, Pakistan |
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| Abstract: | Papaya ringspot virus-W (PRSV-W) and Tomato chlorotic spot virus (TCSV) are common viruses infecting vegetables in south Florida. Application of plant growth-promoting rhizobacteria (PGPR) has emerged as a potential alternative of chemical pesticides to control these viruses. But, it is not sufficient to completely replace chemical control. This study aimed to investigate the synergistic effect of chitosan and PGPR to control PRSV-W and TCSV. The efficiency of PGPR to suppress PRSV-W and TCSV was significantly improved when they were accompanied with chitosan treatment. The highest reduction in disease severity of both PRSV-W and TCSV was achieved when chitosan treatment was accompanied with mixture of two PGPR (IN937a + SE34) or three PGPR strains (IN937a + SE34 + SE56). The results of this study proved that implementation of chitosan and PGPR could significantly restrict losses due to PRSV-W and TCSV in squash and tomato, in Florida and the United States. |
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| Keywords: | Chitosan plant growth-promoting rhizobacteria (PGPR) Papaya ringspot virus (PRSV-W) Tomato chlorotic spot virus (TCSV) |
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