| 橡胶树不同种群炭疽菌对杀菌剂的敏感性 |
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| 引用本文： | 贺竞锋,刘先宝,李博勋,蔡吉苗,冯艳丽,黄贵修.橡胶树不同种群炭疽菌对杀菌剂的敏感性[J].热带生物学报,2022,13(6):582-588. |
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| 作者姓名： | 贺竞锋 刘先宝 李博勋 蔡吉苗 冯艳丽 黄贵修 |
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| 作者单位： | 1.海南大学 热带作物学院，海口 570228 |
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| 基金项目： | 海南省重点研发计划项目（ZDYF2021XDNY153） |
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| 摘 要： | 为了解国内主要植胶区炭疽菌复合种菌株对不同杀菌剂的敏感性，采用生长速率法室内测定乐东炭疽(Colletotrichum.ledongense)、果生刺盘孢(C. fructicola)、暹罗炭疽(C. siamense)、版纳炭疽(C. bannanense)、C.laticiphilum、新种群和华南炭疽(C. australisinense)9株胶孢炭疽病菌(C.glocosporioides Penz.)和8株尖孢炭疽菌(C. acutalum Simmons)对8种杀菌剂的敏感性，并在此基础上进行二元复配评价。结果表明:供试的17株橡胶树炭疽病菌对咪鲜胺最敏感、EC50值为0.001 1～0.218 7 mg·L?1，平均为0.085 3 mg·L?1；咪鲜胺、多菌灵、氟硅唑、戊唑醇、己唑醇、咪鲜胺·三唑酮6种药剂对炭疽菌菌丝生长有显著抑制作用，腈菌唑和粉唑醇对病原菌菌丝抑制效果较差；多数以三唑类为代表的麦角甾醇生物抑制剂对病原菌菌丝生长有明显的抑制效果，尖孢复合种内的新种群对粉唑醇、腈菌唑觉和多菌灵3种药剂敏感性性差；咪鲜胺与戊唑醇的比例分别在7∶3和4∶6时对橡胶树炭疽菌优势种群暹罗炭疽和华南炭疽的抑制效果最优。
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| 关 键 词： | 橡胶树 胶孢复合种 尖孢复合种 敏感性 复配 |
| 收稿时间： | 2022-02-17 |
Evaluation of fungicide sensitivity of Colletotrichum spp. From rubber trees and fungicidal effect of fungicide mixtures |
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| Affiliation: | 1.College of Tropical Crops, Hainan University, Haikou, Hainan 5702282.Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs/Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Haikou, Hainan 571101, China |
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| Abstract: | In order to understand the sensitivity of various Colletotrichum spp. to different fungicides in different species complexes in various rubber planting areas in China, the sensitivity of C. ledongense, C. fructicola and C. siamense in the C. glocosporioides species complex and C. bannanense, C. laticiphilum, new species groups, and C. australisinense in the C. acutalum species complex to 8 fungicides were determined by growth rate method, based on which two fungicides were mixed at different ratios to evaluate their effectiveness. The results showed that 17 strains of Colletotrichum spp. from rubber anthracnose were the most sensitive to prochloraz, with EC50 values of 0.001 1 ? 0.218 7 mg·L?1, averaging 0.085 3 mg·L?1. The fungicides prochloraz, carbendazim, flusilazole, tebuconazole, hexazolol and the mixtures of prochloraz and triadimefon had a significant inhibitory activity against the mycelial growth of Colletotrichum spp, the pathogenic fungi from the rubber anthracnose. Nitridazole and fenoxazole had a poor inhibitory effect on the mycelial growth of the pathogenic fungi. Most ergosterol biological inhibitors represented by triazole had a significant inhibitory effect on the mycelial growth of the pathogenic fungi. The new species groups had a poor sensitivity to fenoxazole, nitridazole and carbendazim. The mixtures of prochloraz and tebuconazole at the respective mix ratios of 7∶3 and 4∶6 had the best inhibitory effect on C. siamense and C. australisinense which were dominant species from the rubber anthracnose. |
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