STUDIES ON DAMPING–OFF AND ROOT-ROT DISEASES OF GREEN BEAN By RASHID MUSHREF THEER B.Sc. (Plant Protection), Fac. Agric., Baghdad Univ., Iraq, 1993 THESIS Submitted in Partial Fulfillment of the Requirements for the Degree of MASTER OF SCIENCE In Agricultural Sciences (Plant Pathology) Department of Plant Pathology Faculty of Agriculture Cairo University EGYPT 2012