Effec of Some Bioagents Against Pathogenic Fungi Associated With Roots of Grapevine Transplants in New Valley Governorate
Year: 2015
Type: article
Abstract: Root rot and wilt diseases complex have been detected in grapevine (Vitis vinifera) transplant nurseries and new orchards at El-Kharga, Baris, Balate, El-Dakhla and El-Farafrah districts, New Valley governorate, Egypt. Percentages of root rot/wilt diseases of grapevine transplants in surveyed districts differed greatly.The most frequent isolated fungi from rotten roots were Fusarium oxysporum, Rhizoctonia solani and Macrophomin phaseolina. In pathogenicity tests, all isolated fungi were pathogenic on grapevine transplants. Under laboratory conditions, all tested bioagents (Azotobacter sp., Bacillus cereus, B. megatherium, B. subtilis) were able to inhibit the growth of the tested fungi with different levels. The effect of these bio-agents either individually or mixed, when used as soil drench treatment, varied greatly in reducing the severity of root rot/wilt diseases under greenhouse conditions. The mixed bio-agents treatment gave the highest protection against the diseases in concern compared to the used bio-agents individually. All treatments significantly increased plant height, number of transplant-1 leaves, leaf area, fresh and dry weights of transplants-1 compared with control treatment.
Language: English
Subfield: Plant Science
Domain: Life Sciences
Open Access status: bronze
OpenAlex ID: W7117472831