Field-collected Culicoides oxystoma adults were exposed to different concentrations of commercial insecticides including chlorpyrifos, DDVP, deltamethyrin, beta-cypermethrin and beta--cypermethrin · emamectin ben...Field-collected Culicoides oxystoma adults were exposed to different concentrations of commercial insecticides including chlorpyrifos, DDVP, deltamethyrin, beta-cypermethrin and beta--cypermethrin · emamectin benzoate via filter paper method, to determine toxicity of different insecticides on C. oxystoma. Results showed that toxicities varied significantly among insecticides. Biting midges were the most susceptible to deltamethyrin （0. 060 mg/L）, followed by chlorpyrifos （0. 588 mg/L）, beta-cypermethrin （ 1. 741 rag/L）, beta-cypermethrin · emamectin benzoate （99.670 mg/L）, and DDVP （600. 496 mg/L）. After exposed to insecticides for 1 h, tested midges were transferred to recovery chamber and observed for another 24 h ; increased mortality within this period was different under different concentrations of each insecticide. Relative toxicity index of dehamethrin was maximal when used as the standard reagent.展开更多
Is the wild animal conservation result in Taiwan good enough to provide the blood resources for the blood sucking insect and cause the insect behavior changed? Based on the bimonthly investigation of Culicoides sp. in...Is the wild animal conservation result in Taiwan good enough to provide the blood resources for the blood sucking insect and cause the insect behavior changed? Based on the bimonthly investigation of Culicoides sp. in Wuling area, Sheipar National Park, by both human bait method and light trap method, we found that there were totally 13,191 individuals trapped by light trap and collected but no one single Culicoides sp. trapped by human bait during the study period of Wuling Long Term Ecological Research (WLTER) in 2012. Two of the three sites were recorded and reported as the midge attacked the ranger and tourists of Sheipa National Park in 2010 and 2011 respectively. Along with the study of WLTER some wild animals encounter more often than before, especially the bird population in the riparian ecosystem of the mountain river Chi Chia Wan Stream. On the other end, Culicoides sp. preferred to the blood of birds and amphibians as well as mammals according to the article review. So, the effectiveness of blood resource from wild animals may cause the behavior of blood sucking insect like as Culicoides sp. shifted to or returned back to the original and the favorite blood resource.展开更多
Biting midges of the genus Culicoides(order Diptera,family Ceratopogonidae)are potential biological vectors for the transmission of certain arboviruses among humans,livestock,and wild animals.This study collected a to...Biting midges of the genus Culicoides(order Diptera,family Ceratopogonidae)are potential biological vectors for the transmission of certain arboviruses among humans,livestock,and wild animals.This study collected a total of 405 Culicoides individuals from seven animal farms located in five counties in the border areas of Yunnan Province,China,and examined the Culicoides species composition and the major arboviruses carried by the Culicoides species.The collected Culicoides were classified into seven species with variable abundances:Culicoides arakawae(5.43%,22/405),Culicoides homotomus(1.23%,5/405),Culicoides obsoletus(19.75%,80/405),Culicoides orientalis(17.28%,70/405),Culicoides oxystoma(29.38%,119/405),Culicoides peregrinus(5.68%,23/405),and Culicoides nipponensis(21.23%,86/405).Among the seven species,C.oxystoma and C.nipponensis were distributed in all the five counties with abundances of 13.33–44.87%and 10.00–46.83%,respectively,suggesting that these were the dominant species of Culicoides widespread on animal farms in the border areas.PCR was used to detect major arboviruses in the collected Culicoides specimens,including bluetongue virus(BTV),Japanese encephalitis virus,Dengue virus,Zika virus,African swine fever virus,and African horse sickness virus.Among the tested viruses,only BTV serotype 1 was tested positive in C.oxystoma specimens collected from a buffalo farm.Culicoides oxystoma was the dominant species on animal farms in the sampled areas,but it has not previously been documented as positive for BTV in China.The current results thus suggest that C.oxystoma could be an important vector for BTV transmission in these border areas,which,however,needs to be confirmed by further comprehensive experiments.Overall,the present study provides the first profile of Culicoides species on animal farms in the China,Vietnam,and Myanmar border areas,establishes the prevalence of arboviruses carried by these Culicoides species,and suggests the vector potential of C.oxystoma species for the transmission of BTV.展开更多
报道了采自四川省九龙县库蠓属一新种：九龙库蠓Culicoides fiulongensis Liu et Wangsp．nov．，本新种与Culicoides sublatifrontis Smatov et lsimbekov，1971相近似，但后者雌虫2个受精囊等大，触角嗅觉器见于第3，7，（10），11～1...报道了采自四川省九龙县库蠓属一新种：九龙库蠓Culicoides fiulongensis Liu et Wangsp．nov．，本新种与Culicoides sublatifrontis Smatov et lsimbekov，1971相近似，但后者雌虫2个受精囊等大，触角嗅觉器见于第3，7，（10），11～14，大颚齿16枚，小颚齿21枚，头喙比（H／P）1．03与本新种明显不相同；本新种与Culicoides latifrontis Shakrizjanova，1962也相近似，但后者触角比（AR）1．00（0．94～1．10），触须比（PR）1．84（1．33～2．00），大颚齿15～17枚与本新种明显不同。新发现了中国新纪录种：切割库蠓CulicoidesabchazicusDzhafarov。1964。模式标本保存在沈阳军区疾病预防控制中心，沈阳110034。展开更多
基金Supported by Key Science and Technology Project of Fujian Province(2014I0001)Science and Technology Plan of General Administration of Quality Supervision,Inspection and Quarantine of China(AQSIQ)(2015IK036)
文摘Field-collected Culicoides oxystoma adults were exposed to different concentrations of commercial insecticides including chlorpyrifos, DDVP, deltamethyrin, beta-cypermethrin and beta--cypermethrin · emamectin benzoate via filter paper method, to determine toxicity of different insecticides on C. oxystoma. Results showed that toxicities varied significantly among insecticides. Biting midges were the most susceptible to deltamethyrin （0. 060 mg/L）, followed by chlorpyrifos （0. 588 mg/L）, beta-cypermethrin （ 1. 741 rag/L）, beta-cypermethrin · emamectin benzoate （99.670 mg/L）, and DDVP （600. 496 mg/L）. After exposed to insecticides for 1 h, tested midges were transferred to recovery chamber and observed for another 24 h ; increased mortality within this period was different under different concentrations of each insecticide. Relative toxicity index of dehamethrin was maximal when used as the standard reagent.
文摘Is the wild animal conservation result in Taiwan good enough to provide the blood resources for the blood sucking insect and cause the insect behavior changed? Based on the bimonthly investigation of Culicoides sp. in Wuling area, Sheipar National Park, by both human bait method and light trap method, we found that there were totally 13,191 individuals trapped by light trap and collected but no one single Culicoides sp. trapped by human bait during the study period of Wuling Long Term Ecological Research (WLTER) in 2012. Two of the three sites were recorded and reported as the midge attacked the ranger and tourists of Sheipa National Park in 2010 and 2011 respectively. Along with the study of WLTER some wild animals encounter more often than before, especially the bird population in the riparian ecosystem of the mountain river Chi Chia Wan Stream. On the other end, Culicoides sp. preferred to the blood of birds and amphibians as well as mammals according to the article review. So, the effectiveness of blood resource from wild animals may cause the behavior of blood sucking insect like as Culicoides sp. shifted to or returned back to the original and the favorite blood resource.
基金supported by the National Key Research and Development Program of China(2017YFD0501805)the Natural Science Foundation of Shanghai,China(19ZR1469000)+1 种基金the Shanghai Science and Technology Development Funds(17391901600)the Project of International Science and Technology Cooperation,China(2014DFE30140)。
文摘Biting midges of the genus Culicoides(order Diptera,family Ceratopogonidae)are potential biological vectors for the transmission of certain arboviruses among humans,livestock,and wild animals.This study collected a total of 405 Culicoides individuals from seven animal farms located in five counties in the border areas of Yunnan Province,China,and examined the Culicoides species composition and the major arboviruses carried by the Culicoides species.The collected Culicoides were classified into seven species with variable abundances:Culicoides arakawae(5.43%,22/405),Culicoides homotomus(1.23%,5/405),Culicoides obsoletus(19.75%,80/405),Culicoides orientalis(17.28%,70/405),Culicoides oxystoma(29.38%,119/405),Culicoides peregrinus(5.68%,23/405),and Culicoides nipponensis(21.23%,86/405).Among the seven species,C.oxystoma and C.nipponensis were distributed in all the five counties with abundances of 13.33–44.87%and 10.00–46.83%,respectively,suggesting that these were the dominant species of Culicoides widespread on animal farms in the border areas.PCR was used to detect major arboviruses in the collected Culicoides specimens,including bluetongue virus(BTV),Japanese encephalitis virus,Dengue virus,Zika virus,African swine fever virus,and African horse sickness virus.Among the tested viruses,only BTV serotype 1 was tested positive in C.oxystoma specimens collected from a buffalo farm.Culicoides oxystoma was the dominant species on animal farms in the sampled areas,but it has not previously been documented as positive for BTV in China.The current results thus suggest that C.oxystoma could be an important vector for BTV transmission in these border areas,which,however,needs to be confirmed by further comprehensive experiments.Overall,the present study provides the first profile of Culicoides species on animal farms in the China,Vietnam,and Myanmar border areas,establishes the prevalence of arboviruses carried by these Culicoides species,and suggests the vector potential of C.oxystoma species for the transmission of BTV.
文摘报道了采自四川省九龙县库蠓属一新种：九龙库蠓Culicoides fiulongensis Liu et Wangsp．nov．，本新种与Culicoides sublatifrontis Smatov et lsimbekov，1971相近似，但后者雌虫2个受精囊等大，触角嗅觉器见于第3，7，（10），11～14，大颚齿16枚，小颚齿21枚，头喙比（H／P）1．03与本新种明显不相同；本新种与Culicoides latifrontis Shakrizjanova，1962也相近似，但后者触角比（AR）1．00（0．94～1．10），触须比（PR）1．84（1．33～2．00），大颚齿15～17枚与本新种明显不同。新发现了中国新纪录种：切割库蠓CulicoidesabchazicusDzhafarov。1964。模式标本保存在沈阳军区疾病预防控制中心，沈阳110034。
