ISSN 2167-0447
International Journal of Agricultural Sciences ISSN: 2167-0447 Vol. 4 (9), pp. 261-267, September, 2014. © International Scholars Journals
Full Length Research Paper
Pathological and physiological studies on root rot disease in white lupine (Lupinus termis Forsik)
Montaser Fawzy Abdel-Monaim 1*; Mohamed R. Gabr 2; Saad M. El-Gantiry1; Mohamed N. Shaat2 and Ali M. El-Bana2
1Legume Diseases Res. Dep., Plant Pathology Res. Inst., Agric. Res. Cen., Giza, Egypt.
2 Plant Pathology Dep., Fac. of Agric., El-Minia Univ. Minia, Egypt. Email: [email protected]
Accepted 26, May 2014
Abstract
Fusarium solani and Macrophomina phaseolina is common fungal pathogens on lupine plants causing damping-off and root rot diseases resulting in serious economic losses. In this study, six isolates of F. solani and four isolates of M. phaseolina were isolated from lupine plants. The obtained resulted indicate that, all isolate able to attack lupine plants causing damping-off and root rot symptoms. Tissue extracts prepared from experimentally diseased root systems showed great pectolytic and cellulolytic activities while healthy tissue extracts of both organs showed slight activities of the enzymes. In varietal response test, four lupine cultivars i.e. Australian, Balady, Giza 1 and Giza 2 were tested for their susceptibility to F. solani (FR2) and M. phaseolina (MR1 ) and the cultivar Balady was most sensitive to both pathogens. Under field conditions, Balady cultivar was highly susceptible towards damping-off and root rot diseases and produced the least seed yield followed by Australian cultivars. On contrary, Giza 2 recorded the least damping-off and root rot severity and gave the highest seed yield followed by Giza 1. The first of December was more suitable to minimize the infection with damping-off and root rot diseases in field. Sowing lupine at 1st November gave the highest seed yield in both growing seasons.
Key words: Lupine, damping-off, root rot, cultivars, sowing dates, pectolytic and cellulolytic activities.