| 周慧珍,荣思文,吴玉珠,王武,张嘉,陈娜,胡军华.青脆李果斑病鉴定及药剂筛选[J].中国南方果树,2023,52(4): |
| 青脆李果斑病鉴定及药剂筛选 |
| Identification and Screening of the Fungicides of Plum Fruit Spot Pathogen |
| 投稿时间：2022-11-01 修订日期：2023-02-23 |
| DOI： |
| 中文关键词: 李 交链格孢菌（Alternaria alternata） 药剂筛选 |
| 英文关键词:plum Alternaria alternata screening of fungicides |
| 基金项目:科技部国家重点研发计划项目(2017YF D0202006-04) |
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| 中文摘要: |
| 为了给防治青脆李果斑病提供理论依据及发展化学防治技术，本文鉴定了青脆李果斑病致病菌种类，也筛选了有效抑制病原菌药剂。通过对青脆李带病果实组织分离、对病菌进行鉴定和致病力评价及用菌丝生长速率法进行室内药剂筛选，结果表明主要致病菌为Alternaria alternata，该菌对健康的金脆李、青脆李、青萘李、半边红李以及脆红李的叶片、枝条和果实均致病，其菌株may8对果实致病力无明显差异，但在叶片和枝条上致病力表现不同，即对青脆李叶片和青萘李枝条致病力最强，而对半边红李叶片和半边红李枝条的致病力最弱。15种杀菌剂中烯唑醇和吡唑醚菌酯杀菌效果最好，EC50分别为0.0971 μg·mL-1和0.4099μg·mL-1，可以进一步用于田间的防治试验。 |
| 英文摘要: |
| In order to provide theoretical basis and develop chemical control technology for the prevention and control of plum fruit spot pathogen, this paper identified the pathogenic bacteria and screen the effective inhibitory agents for the prevention and control of plum fruit blotch. Through the tissue isolation of the diseased fruit of Qingcui plum, the identification and evaluation of pathogenicity of the pathogen, and the indoor agent screening by mycelial growth rate method, the results showed that the main pathogenic bacteria was Alternaria alternata, which caused disease to the leaves, branches and fruits of healthy Jincui plum, Qingcui plum, Qingnai plum, Ban Bianhong plum and Cuihong plum, and its strain may8 had no obvious difference in fruit pathogenicity, but the pathogenicity performance on leaves and branches was different. That is, the most pathogenic to the leaves of Qingcui plum and the branches of the Qingnai plum, while the weakest pathogenicity to Ban Bianhong plum leaves and Ban Bianhong plum branches. Among the 15 fungicides, Diniconazole and Pyraclostrobine had the best bactericidal effects, with an EC50 of 0.0971 μg·mL-1 and 0.4099μg·mL-1, which could be further used in field control experiments . |
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