期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
不同体色种群烟蚜传播CMV的效率 被引量:5
1
作者 洪家保 邓建华 《烟草科技》 EI CAS 北大核心 2006年第1期58-62,共5页
研究了不同体色种群烟蚜对CMV的传播效率和烟蚜的持毒能力。结果表明:红色和绿色种群的烟蚜,都可在0.5min时间内获毒或传毒。且传毒效率随着获毒或传毒时间的延长而提高。当获毒时间和传毒时间超过5min时,传毒效率提高幅度减缓。传... 研究了不同体色种群烟蚜对CMV的传播效率和烟蚜的持毒能力。结果表明:红色和绿色种群的烟蚜,都可在0.5min时间内获毒或传毒。且传毒效率随着获毒或传毒时间的延长而提高。当获毒时间和传毒时间超过5min时,传毒效率提高幅度减缓。传毒蚜虫数量在低密度(1~5头/株)时,随着蚜虫数量的增加,传毒效率提高明显,当蚜虫数量大于5头/株时,传毒效率上升的趋势减缓。烟蚜的持毒时间在连续传毒的情况下约为25min,而在获毒后不立即进行传毒时,则持毒时间可延长至40min。因此,红色和绿色烟蚜种群的持毒能力均较弱,生产上防治CMV应采取驱蚜防病的措施。 展开更多
关键词 烟蚜 CMV 传毒效率 传毒时间 获毒时间 持毒时间
下载PDF
烟盲蝽传播云南烟草丛枝症病害研究 被引量:6
2
作者 严乃胜 李正跃 +2 位作者 孙跃先 许若清 陈斌 《植物保护学报》 CAS CSCD 北大核心 2001年第3期250-253,共4页
用生物学测定方法对烟盲蝽传播云南烟草丛枝症的规律进行了研究。结果表明,烟盲蝽能够传毒的最少头数为1头,传毒效能随带毒虫数量的增加而增加,单株虫量为1~3头时,传毒效能为50%,单株虫量为5~10头时,传毒效能为60%~80%,单株虫量... 用生物学测定方法对烟盲蝽传播云南烟草丛枝症的规律进行了研究。结果表明,烟盲蝽能够传毒的最少头数为1头,传毒效能随带毒虫数量的增加而增加,单株虫量为1~3头时,传毒效能为50%,单株虫量为5~10头时,传毒效能为60%~80%,单株虫量达15头以上时,传毒效能达100%;烟盲蝽成虫或若虫能够获毒的最短取食时间为1h,在1~6h范围内,相同时间内的若虫获毒率高于成虫,获毒时间在6h以上时成虫与若虫的获毒率相同,达90%以上,获毒时间在12h以上时,获毒率达100%;烟盲蝽若虫传毒的最短取食时间为0.5h,成虫传毒的最短取食时间为1h;当取食时间超过最短时间时,传毒率随取食时间的增加而升高。若虫取食时间达12h以上、成虫取食时间达24h以上时,传毒率达100%。 展开更多
关键词 烟盲蝽 烟草簇矫病毒 获毒时间 传毒时间 烟草 丛枝症 传毒效能
原文传递
Duration of viral shedding of Influenza A(H1N1) virus infection treated with oseltamivir and/or Traditional Chinese Medicine in China:A retrospective analysis 被引量:6
3
作者 王玉光 姜淼 +6 位作者 王融冰 査青林 张素娟 周桂琴 李兴旺 王永炎 吕爱平 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2012年第2期148-155,共8页
OBJECTIVE:H1N1 was a new and potentially serious infectious disease,in human,the severity of influenza can vary from mild to severe,thus to find an effective and safety way to control the influenza pandemic is of cruc... OBJECTIVE:H1N1 was a new and potentially serious infectious disease,in human,the severity of influenza can vary from mild to severe,thus to find an effective and safety way to control the influenza pandemic is of crucial importance.This retrospective study describes the duration of viral shedding in H1N1 patients that were hospitalized and treated in China.METHODS:Clinical data were collected from May to July,2009 in China for 963 patients with influenza A(H1N1) virus infection.Patients were treated based on the guidelines issued by the Chinese Ministry of Health.The primary outcome was duration of viral shedding and statistical comparisons were performed.RESULTS:In the patients with body temperature greater than 38.0℃,there were no differences in virus shedding duration among the patients taking oseltamivir within two days,patients undergoing Traditional Chinese Medicine(TCM) therapy or those receiving no drug therapy.In patients with body temperature 338.1℃,TCM therapy reduced the viral shedding duration(P<0.05,vs.oseltamivir therapy).Furthermore,taking oseltamivir two days after onset of symptoms might prolong the virus shedding duration(P<0.05,vs.taking oseltamivir less than 2 days of onset).CONCLUSION:TCM therapy is effective for reducing the length of virus shedding in patients with body temperature 338.0℃.Oseltamivir used for reducing virus shedding duration should be taken within two days of onset. 展开更多
关键词 H1N1 Treatment of oseltamivir Treatment of TCM
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部