HASSANEIN, A., EL-BAROUGY, E., ELGARHY, A., PARIKKA, P., EL-SHARKAWY, T. (2000). BIOLOGICAL CONTROL OF DAMPING-OFF, ROOT- ROT / WILT DISEASES OF ALFALFA IN EGYPT. Egyptian Journal of Agricultural Research, 78(1), 63-71. doi: 10.21608/ejar.2000.321463
AHMED M. HASSANEIN; EBTEHAG EL-BAROUGY; ABDA-ALLAA M. ELGARHY; PAIVI PARIKKA; TAHA A. EL-SHARKAWY. "BIOLOGICAL CONTROL OF DAMPING-OFF, ROOT- ROT / WILT DISEASES OF ALFALFA IN EGYPT". Egyptian Journal of Agricultural Research, 78, 1, 2000, 63-71. doi: 10.21608/ejar.2000.321463
HASSANEIN, A., EL-BAROUGY, E., ELGARHY, A., PARIKKA, P., EL-SHARKAWY, T. (2000). 'BIOLOGICAL CONTROL OF DAMPING-OFF, ROOT- ROT / WILT DISEASES OF ALFALFA IN EGYPT', Egyptian Journal of Agricultural Research, 78(1), pp. 63-71. doi: 10.21608/ejar.2000.321463
HASSANEIN, A., EL-BAROUGY, E., ELGARHY, A., PARIKKA, P., EL-SHARKAWY, T. BIOLOGICAL CONTROL OF DAMPING-OFF, ROOT- ROT / WILT DISEASES OF ALFALFA IN EGYPT. Egyptian Journal of Agricultural Research, 2000; 78(1): 63-71. doi: 10.21608/ejar.2000.321463
BIOLOGICAL CONTROL OF DAMPING-OFF, ROOT- ROT / WILT DISEASES OF ALFALFA IN EGYPT
1Plant Pathology Research Institute, Agricultural Research Center, Cairo, Egypt
2Plant Protection Research Institute, Agricultural Research Center, Jokioinen, Finland
Abstract
Alfalfa (Medicago sativa L.) is subject to stand injury and yield loss from several diseaes, such as damping-off, wilt and root-rot. Rhizoctonia solani and Fusarium oxysporum are the main pathogens of these diseases. There are great efforts to reduce environmental pollution by reducing the usage of agrochemicals to control pests. Biological control of many diseases is used as a mean to increase forage production. Some bioagents [Trichodermaharzianum, T.viride, Bacillus subtilis and Mycostop (Streptomyces grisioviridis)] significantly inhibited mycelial growth of Rhizoctonia solani)) and Fusarium oxysporum in vitro . Trichoderma harzianum and T.viride overlapped with the pathogens and suppressed the growth by 53 and 48% for R.solani, and 66 and 60.6 for F.oxysporum. Also, 8.subitilis and Mycostop expressed inhibitory zone, and inhibited pothogen's by 36.1 and 59.4% for R.solani and 46.3 and 72.8% for F.oxysporum. Under greenhouse conditions, all tested biocontrol agents significantly decreased damping-off and root-rot/wdt diseases in alfalfa. T.harzianum, Gliocladium virens and Mycostop were more effective in controlling camping-off and root-rot/wilt diseases caused by R.solani and F.oxysporum in alfalfa.