Muataz Haidar*(1), and Jaoudat Faddoul(2)
(1). Diseases Department, Plant Protection Research Department, General Commission for Scientific Agricultural Research, Damascus, Syria.
(2). Plant Protection Department, Faculty of Agriculture, Damascus University, Damascus,Syria.
(*Corresponding author: Muataz Haidar, Email:moatazhidar986@gmail.com)
Received: 29/08/2021 Accepted: 24/10/ 2021
Abstract:
The efficacy of two species of Trichoderma and mycorrhizal fungi was tested against the pathogen of black-scale disease, Rhizoctonia solani, in a pot. The results showed that biological agents stimulated plant growth and increased the length of the plant, the wet weight of the aerial shoot and the root total, and crop production. Results showed that mycorrhizal fungus was significantly superior to T. viride and T. harzianum in reducing the percentage of severity infection on the stem which, they were (25%, 33.3%, and 41.7%) respectively. But when we added the three biological agents, the percentage of severity infection reduced significantly to (11.44%), In addition to the reduction of the number of sclerotia on tubers and the percentage of severity infection on tubers reduced to (7.04%) the superior significantly in other treatments. Results showed the use of chemical fungicide (Moncut) with biological agents supported the role of these biological agents in reducing the infection severity.
Keyword: Rhizoctonia solai, Trichoderma harzianum, T. viride, Mycorrhiza.
Full paper in Arabic: pdf