ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Fungi causing postharvest decay of sugar beet root in Kermanshah.

Sheikholeslami, M.; Hedjaroude, G. A.; Okhovat, M.;

Iranian Journal of Plant Pathology Year: 1998 Vol: 34 Issue: 1/2 Pages: 84-91 (Pe), 22-24 (En) Ref: 19 ref.

1998

บทคัดย่อ

During 1993-95 experiments were conducted to investigate postharvest fungal rot of sugarbeet in Kermanshah province in Iran. Samples were taken from the clamps around the fields, delivery trucks and storage piles at the Bisotun factory. Twenty different isolates belonging to 12 genera of fungi were isolated from decaying roots. Pathogenicity tests were conducted by inoculation of intact roots with 5 mm discs of young cultures of the fungi followed by incubation in wet sterilized sand. The results showed that Rhizoctonia solani, Phytophthora drechsleri, Macrophomina phaseolina and Phoma betae [Pleospora betae] were pathogenic on uninjured roots. Rhizopus arrhizus induced the most decay in the intact roots and was more virulent than Rhizopus stolonifer. Fusarium species were less pathogenic than other species. Among them F. moniliforme [Gibberella fujikuroi] and F. oxysporum were more virulent than others. Two species of Penicillium could cause rot and among them P. calviforme was more virulent th

an P. verrucosum. Aspergillus niger also incited root rot. Other species belonging to the genera Fusarium, Alternaria, Mucor, Geotrichum and Gliocladium were not pathogenic. All the pathogenic fungi caused a reduction in total extractable sugar; in the case of R. solani and P. verrucosum the amount of sugar was reduced to zero.