Abstract
The pathogenicity of Egyptian and German isolates of soil-borne root rotting fungi to seedlings of three cultivars of sugarbeet in presence or absence of different concentrations of either NaCl or CaCl2 were studied under greenhouse conditions. In the absence of salt treatments Egyptian isolates ofRhizoctonia solani were most virulent on all sugarbeet cultivars followed bySclerotium rolfsii andFusarium oxysporum f. sp.betae, the latter proved to be a weak pathogen. The results also revealed that the German isolates ofSclerotinia sclerotiorum were pathogenic to all sugarbeet cultivars studied, whileBotrytis cinerea was only a weak pathogen. However, the presence of salts, NaCl or CaCl2, in different concentrations seemed to cause alterations in such pathogenicity.
Similar content being viewed by others
References
Abada K A M 1980 Studies on Sugarbeet Root-rot with Special Reference toSclerotium rolfsii Sacc., M. Sc. thesis Fac. Agric. Cairo Univ.
Afanasiev M M 1948 The relation of six groups of fungi to seedling disease of sugarbeet in Montana. Phytopathology 38, 205–212.
Ashour W A, Sirry A R and Fadl F A M 1964 Effect of some environmental factors on damping-off and root-rot diseases of sugarbeet in Egypt. Ann. Agric. Sci. Univ. Ain-Shams 9, 175–204.
Ashour W A, Sirry A R and Fald F A M 1967 Physiological studies onPhoma betae Frank andRhizoctonia solani (Prill and Delacr.) Bourd. and Galz. which cause damping-off and root-rot diseases of sugarbeet in Egypt. Ann. Agric. Sci. Univ. Ain-Shams 10, 213–244.
Dregne H E 1976 Soils of Arid Regions. Elsevier New York.
El-Abyad M S, Ismail I K and Rizk M A 1979 Ecological studies on the microflora of saline Egyptian soils. Proc. Int. Arid Land Conf. Pl. Res. Texas Techn. Univ. Lubbock.
El-Abyad M S, Ismail I K and Rizk M A 1985 Ecological studies on the rhizospheres of some Egyptian halophytic plants. Egypt. J. Bot. 25, 91–107.
El-Abyad M S and Afifi M A 1988a Effects of some environmental factors on sugarbeet Fusarium pathogen. I. Germination and survival of macroconidia.In press.
El-Abyad M S and Afifi M A 1988b Effects of some environmental factors on sugarbeet Fusarium pathogen. II. Growth and sporulation.In press.
El-Kazzaz M K, Mehiar F F and El-Khadem M M 1977 Powdery mildew on sugarbeet: A new record for Egypt. Egypt. J. Phytopath. 9, 83–84.
El-Kholi M A 1978 Studies on Root Rot of Sugarbeet in Egypt. M.Sc. thesis Fac. Agric. Ain-Shams Univ.
Harley J L and Waid J S 1955 A method for studying active mycelia on living roots and other surfaces in the soil. Trans. Br. Mycol. Soc. 38, 104–118.
Hedjaroude G A and Allzadeh J 1970Rhizoctonia solani Kühn, a pathogen causing brown rot of sugarbeet in Iran. Iran. J. Pl. Path. 6, 53–62.
Held V M and Haenseler C M 1953 Cross-inoculation with New Jersey isolates ofSclerotinia sclerotiorum, S. minor andS. trifoliorum. Pl. Dis. Rept. 37, 515–517.
Johnson R T, Alexander J T, Rush G E and Hawkes G R 1971 Advances in Sugarbeet Production: Principles and Practices. Iowa State Univ. Press, Ames.
Kretzschmar R 1979 Kulturtechnisch-bodenkundliches Praktikum: Ausgewählte Laboratoriumsmethoden. Eine Anleitung zum selb-ständigen Arbeiten an Böden. Inst. Wasserwirtsch. Meliorationswesen Univ. Kiel.
Mehiar F F, El-Kazzaz M K and El-Khadem M M 1977 The occurrence of sugarbeet rust in Egypt. Egypt. J. Phytopath. 9, 85–86.
Palti J 1959 OnSclerotium rolfsii infection of beet. Hassadeh 39, 963–964.
Rizk M A 1986 A survey on the Mycoflora—with Emphasis on Pathogens—associated with Sugarbeet Cultivation in Saline Egyptian Soils. Ph.D. thesis Fac. Sci. Cairo Univ.
Whitney E D and Duffus J E 1986 Compendium of beet diseases and insects. Am. Phytopath. Soc. St. Paul.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
El-Abyad, M.S., Hindorf, H. & Rizk, M.A. Impact of salinity stress on soil-borne fungi of sugarbeet. Plant Soil 110, 27–32 (1988). https://doi.org/10.1007/BF02143535
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02143535