云南烟草丛枝症病害研究 ⅩⅢ 大理州烤烟丛枝症病害的发生与防治

Studies on Tobacco Witches' Broom Symptom Diseases in Yunnan ⅩⅢ Infection and Prevention in Dali Prefecture

烟草丛枝症病害表现为黄化丛枝症， 导致烤烟经济性状和产量产值明显下降． 未筛选到治疗病害的有效药剂， “治虫防病”措施的平均防效为６１９ ％ ， “以治虫防病为主体， 综合防治烟草丛枝症病害技术体系” 的平均防效为８６９ ％ ， ２０ ｈｍ２ 中心示范样板田的防效为７７２ ％ ， 每ｈｍ２ 挽回产量８７３ ｋｇ 、挽回产值１１ ３１８８５ 元， 确认综合防治技术能有效而可靠地控制烟草丛枝症病害的危害．

The tobacco witches' broom symptom disease showed yellow witches' broom symptom and reduced economic character and production value of the tobacco obviously. No medicines be found to cure the disease.The average rate of prevention was 61 9% taking the measures of “killing insects to preventing disease”.the rate was 86 9% taking the measures of “the technology system of the synthetical prevention and cure in main of killing insects to preventing disease”.In 20 hectares tobacco demonstrating the synthetical technology, the rate of prevention was 77 2%, and decreased loss 873 kg tobacco leaf costing 11 318 85 Yuan RMB per hectare.This technology can control the harm of the tobacco witches' broom symptom disease unfailingly and effectively.