| 蓝国兵 1, 2，何自福 1，于 琳 1，汤亚飞 1，李正刚 1，邓铭光 1，佘小漫 1, 2.戊唑醇和咯菌腈复配对火龙果褐腐病菌的联合毒力及田间防效[J].广东农业科学,2020,47(5):79- |
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戊唑醇和咯菌腈复配对火龙果褐腐病菌的联合毒力及田间防效 |
| Synergistic Toxicity and Field Control Efficacy of Tebuconazole and Fludioxonil against Neoscytalidium dimidiatum on Pitaya |
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| DOI：10.16768/j.issn.1004-874X.2020.05.010 |
| 中文关键词: 戊唑醇 咯菌腈 火龙果褐腐病菌 联合毒力 田间防效 |
| 英文关键词: tebuconazole fludioxonil Neoscytalidium dimidiatum synergistic toxicity field control efficacy |
| 基金项目:74 |
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| 摘要点击次数: 1636 |
| 全文下载次数: 644 |
| 中文摘要: |
| 【目的】明确戊唑醇和咯菌腈复配对火龙果褐腐病菌联合毒力与田间防治效果。【方法】采用生长速率法测定戊唑醇、咯菌腈及其复配药剂对火龙果褐腐病菌的室内毒力，以 Wadley 法评价增效作用，并验证了复配药剂对火龙果褐腐病的田间防效。【结果】咯菌腈和戊唑醇对火龙果褐腐病菌均表现出良好的抑菌效果，EC50 值分别为 0.0045、0.0671 mg/L。戊唑醇与咯菌腈不同配比对火龙果褐腐病菌表现为加和作用。有效浓度分别为 100 mg/kg 和 500 mg/kg 连续喷施 3 次时，末次药后 7 d，戊唑醇和咯菌腈质量比 8 ∶ 2 复配对火龙果褐腐病平均防效分别为 80.31% 和 89.44%，戊唑醇单剂平均防效分别为 80.24% 和 89.71%，咯菌腈单剂平均防效分别为70.08% 和 76.29%；末次药后 15 d，戊唑醇和咯菌腈质量比 8 ∶ 2 复配平均防效分别为 76.80% 和 83.63%，戊唑醇单剂平均防效分别为 74.63% 和 81.22%，咯菌腈单剂平均防效分别为 54.53% 和 65.24%；复配药剂两种施药浓度的防效均比使用相同浓度单一药剂的防效高。【结论】戊唑醇和咯菌腈质量比为 8 ∶ 2 的复配药剂对火龙果褐腐病菌具有良好的抑菌效果，在田间防治效果好且对火龙果无药害，可以在火龙果生产上推广使用。 |
| 英文摘要: |
| 【Objective】The study was to clarify the synergistic toxicity and field control efficacy of tebuconazole and fludioxonil against Neoscytalidium dimidiatum on pitaya.【Method】The mycelial growth rate method was used to determine the in vitro toxicity efficacy of tebuconazole, fludioxonil and their compound fungicide on N. dimidiatum. The synergistic effect of the compound fungicide was evaluated by Wadley method. The field experiment of the compound was carried out to verify its control effect on pitaya brown rot disease.【Result】 Fludioxonil and tebuconazole showed good inhibitory effect against N. dimidiatum on pitaya, and the EC50 values were 0.0045 and 0.0671 mg/L, respectively. The compound of tebuconazole and fludioxonil exhibited an additive effect on N. dimidiatum. After 7 days of the last spraying with the active ingredient concentrations of 100 mg/kg and 500 mg/kg on pitaya plants for three times, the average control effects of tebuconazole and fludioxonil with the mass ratio of 8 ∶ 2 were 80.31% and 89.44%, respectively. And the average control effect of single tebuconazole was 80.24% and 89.71%, while the average control effect of single fludioxonil was 70.08% and 76.29%, respectively. After 15 days of the last spraying, the average control effect of tebuconazole and fludioxonil with the mass ratio of 8 ∶ 2 was 76.80% and 83.63%, respectively. And the average control effect of single tebuconazole was 74.63% and 81.22%, while that of single fludioxonil was 54.53% and 65.24%, respectively. The control effect of two active ingredient concentrations of tebuconazole and fludioxonil compound was higher than that of single fungicide.【Conclusion】The compound of tebuconazole and fludioxonil with the mass ratio of 8 ∶ 2 showed good inhibitory effect to N. dimidiatum on pitaya, and exhibited good control efficacy in the field, with non-toxicity to pitaya. Therefore, the compound fungicide with the mass ratio of 8 ∶ 2 could be promoted in pitaya production. |
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