| 摘要: |
| 【目的】探索青海地区青稞条纹病的发生流行动态规律及敌萎丹药剂防治技术，为青稞安全生产及条纹病的有效防治提供参考。【方法】在青海刚察县(2010年)和西宁地区(2011年)青稞试验田，在分蘖-腊熟期的各个生育阶段对青稞条纹病的发病情况进行系统观察，并选用不同剂量3%敌萎丹悬浮剂进行药效试验。【结果】在青海地区，青稞条纹病于分蘖期在田间出现，乳熟期-腊熟期达到发病高峰期，病情指数为30.20。2010年，刚察县青稞条纹病在抽穗-灌浆阶段，病害流行速率最快，日平均增长11.66%；2011年在西宁地区，青稞条纹病在6月中旬至6月下旬(灌浆-乳熟)阶段，病害流行速率最快，日平均增长14.96%。有效杀菌剂3%敌萎丹悬浮剂1.0，1.5，2.0 mL/kg 3个剂量拌种处理后，青稞条纹病病情较空白对照明显减轻，且3种处理较空白对照推迟病害流行盛期30～38 d。【结论】在青海地区，条纹病于青稞乳熟期-腊熟期达到发病高峰期，在抽穗-乳熟阶段，病害流行速率最快。经不同剂量3%敌萎丹悬浮剂处理后，青稞整个生育期都不会出现条纹病病害流行盛期，条纹病对青稞产量不会造成威胁。 |
| 关键词: 青稞条纹病 动态规律 3%敌萎丹 |
| DOI： |
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| 基金项目:国家现代农业产业技术体系项目“青藏高原青稞主要病害灾变特点与防控技术研究”（CARS-05） |
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| Prevalence status of barley stripe disease and its control with dividend |
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ZHU Haixia, GUO Qingyun, CHEN Haimin,et al
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Qinghai Academy of Agricultural and Forestry Sciences
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| Abstract: |
| 【Objective】The occurrence regularity and control technique of barley stripe disease were explored in Qinghai.【Method】The incidence of barley stripe disease was observed systematically from tillering stage to dough stage of highland barley in Gangcha and Xining,Qinghai in 2010-2011,and control of the disease with different doses of 3% dividend was studied.【Result】Barley stripe disease appeared in tillering stage in Qinghai,and peaked during milking-doughing with disease index of 30.20.In 2010,disease epidemic rate in Gangcha was the highest during heading-filling with a daily increasing rate of 11.66%.In 2011,the disease epidemic rate in Xining reached the highest from mid June to late June (grouting milking) with a daily increasing rate of 14.96%.3% dividend with doses of 1.0,1.5,and 2.0 mL/kg effectively inhibited the disease after seed treatment,and the prevalence peak was delayed by 30 to 38 days compared with the control.【Conclusion】The disease index of barley stripe disease reached the highest during milking-doughing in Qinghai,and disease epidemics rate was the fastest during heading-milking.Treatment with 3% dividend prevented the emergence of prevalence. |
| Key words: barley stripe disease occurrence regularity 3% dividend |
