| 戴德江.杨梅褐斑病防治药剂的筛选与应用及其对嘧菌酯敏感基线的建立[J].中国南方果树,2018,47(1): |
| 杨梅褐斑病防治药剂的筛选与应用及其对嘧菌酯敏感基线的建立 |
| Screening and application technique of fungicides against Myrica mycosphaerella leaf spot disease and building its baseline to azoxystrobin |
| 投稿时间：2017-06-26 修订日期：2017-09-18 |
| DOI： |
| 中文关键词: 杨梅褐斑病 药剂筛选 防效 敏感基线 |
| 英文关键词:Myrica mycosphaerella fungicides screening efficacy sensitivity baseline |
| 基金项目:浙江省科技计划公益技术研究农业项目（2015C32008）；浙江省“三农六方”科技计划项目；浙江省小品种作物农药登记财政项目。 |
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| 中文摘要: |
| 采用菌丝生长速率法，测定了11种杀菌剂对杨梅褐斑病菌的离体抑菌活性，结果表明，嘧菌酯的抑制活性最强，EC50值为0.96 mg/L；百菌清的活性最弱，EC50值为69.24 mg/L；其余药剂的抑制活性依次为吡唑醚菌酯＞氟硅唑>腈菌唑>抑霉唑>戊唑醇>咪鲜胺>喹啉铜>代森锰锌>多菌灵，EC50值在3.25～68.73 mg/L之间。林间试验结果表明，嘧菌酯对杨梅褐斑病具有很好的控制效果，其防效显著优于喹啉铜和多菌灵。进一步的研究结果表明，供试100株杨梅褐斑病菌对嘧菌酯的EC50值在0.15～2.17 mg/L之间，呈近似正态的连续分布，其平均EC50值为0.97?.22 mg/L，可作为该病菌对嘧菌酯的敏感性基线，用于田间抗药性监测。 |
| 英文摘要: |
| Inhibition activity of 11 fungicides against Myrica mycosphaerella was determined by methods of mycelia growth rate. The results showed that azoxystrobin had the strongest activity with a 50% effective concentration (EC50) of 0.96 mg/L, while chlorothalonil had the weakest activity with the EC50 of 69.24 mg/L. The activity of other fungicides was pyraclostrobin＞flusilazole＞myclobutanil＞imazalil＞tebuconazole＞prochloraz＞oxine-copper＞mancozeb＞carbendazim indicated with the EC50 of 3.25～68.73 mg/L. In field experiments, azoxystrobin possessed better control effects compared with oxine-copper and carbendazim. Further study suggested that the EC50 of azoxystrobin against the test population (n=100) of Myrica mycosphaerella had unimodal distribution and varied from 0.15～2.17 mg/L with the mean of 0.97?.22 mg/L, which could be adopted as the sensitivity baseline for resistance monitoring. |
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