<i>In Vitro</i>Antagonistic Activity of <i>Trichoderma harzianum</i>and <i>Bacillus amyloliquefaciens</i>against <i>Colletotrichum acutatum</i>

• 作者: A?cha El Oualkadi Ahmed Lamarti Alain Badoc Houda Tahiri Latifa Azaroual Patrick Martin Rababe Es-Soufi
• 来源期刊: 微生物学(英文)
• 学科: 农学
• 关键词: Biocontrol ANTAGONISM Bacillus amyloliquefaciens Trichoderma HARZIANUM ANTHRACNOSE Colletotrichum acutatum
• 年，卷（期）: 2020,（3）
• 页码范围: 82-94
• 页数: 13页
• 分类号: S47

摘要

Biological control of plant diseases makes extensive use of the antagonists. The effectiveness of the control depends on the choice of an effective antagonist strains from criteria of implying a good knowledge of biological peculiarities of the material used. In this study, the antagonistic activities of nine isolates of Bacillus amyloliquefaciens and one isolate of Trichoderma harzianum were tested in vitro against seven strains of Colletotrichum acutatum, the causal agent of strawberry anthracnose. It was found that T. harzianum and B. amyloliquefaciens strains showed the ability to inhibit the mycelial growth of the pathogen by dual culture technique by more than 50 percent. The nonvolatile substances produced by the antagonists showed high inhibition percentages that are more than 99 percent, meanwhile their volatile compounds inhibited the mycelial growth of C. acutatum strains with low inhibition percentages starting from 30 percent except the substances produced by B. amyloliquefaciens Bc2 that showed a high inhibition percentage of more than 70 percent.