The passive flight of large numbers of mitospores ensures propagation and survival of many fungal species. Moreover, many fungi have a surplus DNA context which allows for easier manipulation and tampering, especially...The passive flight of large numbers of mitospores ensures propagation and survival of many fungal species. Moreover, many fungi have a surplus DNA context which allows for easier manipulation and tampering, especially when inserting eukaryotic genes and translation systems. These facts taken together suggest a high prominence of the sporogonic airborne fungi in biosecurity/biodefence priority lists, but due to the low virulence and mortality of the fungal pathogens, they do not figure high, or, sometimes, not at all. The disruptive effect of biosecurity fungal threats is important per se and genetic manipulations are to further it. Novel, long range and high-persistence sampling methods, using robotics and unmanned systems already fielded in other applications may extend surveillance and responsive sampling. Effects-based, proteomic approaches may provide a solution for deliberate incidents, while polyphasic taxonomy may resolve spontaneous incidents and assist medical diagnosis, but in the biosecurity context, where mass collection and processing of samples and speed in producing robust results are vital, complex approaches might be proved more of a hindrance than an asset.展开更多
In late 2018,the fall armyworm(FAW)Spodoptera frugiperda Smith(Lepidoptera:Noctuidae)made its arrival in China and its populations have since proliferated across most of eastern Asia.While S.frugiperda exhibits a cons...In late 2018,the fall armyworm(FAW)Spodoptera frugiperda Smith(Lepidoptera:Noctuidae)made its arrival in China and its populations have since proliferated across most of eastern Asia.While S.frugiperda exhibits a considerable dispersal capacity and engages in long-distance migration,there’s only scant information on the species’flight capability.Here,we empirically assessed S.frugiperda flight activity under varying climatic conditions using a flight mill.More specifically,under laboratory conditions,FAW exhibited superior flight performance at 20-25℃ and 60-90%relative humidity(RH).When quantifying flight performance over five consecutive nights(i.e.,10 h/night),all flight parameters initially increased and then gradually dropped and FAW adults attained a total flight distance,duration and velocity equal to 63.73 km(48.42-94.12 km)(median,quartile range),24.12 h(20.87-27.73 h)and 2.73 km h^(-1)(2.13-3.33 km h^(-1)),respectively.Our work constitutes a first comprehensive assessment of S.frugiperda flight performance and provides baseline information for future efforts to forecast spatiotemporal changes in its geographical distribution,movement patterns and invasion trajectories.Such can ultimately permit a timely and targeted deployment of area-wide pest management measures against this newly-invasive pest in China and across eastern Asia.展开更多
文摘The passive flight of large numbers of mitospores ensures propagation and survival of many fungal species. Moreover, many fungi have a surplus DNA context which allows for easier manipulation and tampering, especially when inserting eukaryotic genes and translation systems. These facts taken together suggest a high prominence of the sporogonic airborne fungi in biosecurity/biodefence priority lists, but due to the low virulence and mortality of the fungal pathogens, they do not figure high, or, sometimes, not at all. The disruptive effect of biosecurity fungal threats is important per se and genetic manipulations are to further it. Novel, long range and high-persistence sampling methods, using robotics and unmanned systems already fielded in other applications may extend surveillance and responsive sampling. Effects-based, proteomic approaches may provide a solution for deliberate incidents, while polyphasic taxonomy may resolve spontaneous incidents and assist medical diagnosis, but in the biosecurity context, where mass collection and processing of samples and speed in producing robust results are vital, complex approaches might be proved more of a hindrance than an asset.
基金supported by the National Natural Science Foundation of China(31727901)。
文摘In late 2018,the fall armyworm(FAW)Spodoptera frugiperda Smith(Lepidoptera:Noctuidae)made its arrival in China and its populations have since proliferated across most of eastern Asia.While S.frugiperda exhibits a considerable dispersal capacity and engages in long-distance migration,there’s only scant information on the species’flight capability.Here,we empirically assessed S.frugiperda flight activity under varying climatic conditions using a flight mill.More specifically,under laboratory conditions,FAW exhibited superior flight performance at 20-25℃ and 60-90%relative humidity(RH).When quantifying flight performance over five consecutive nights(i.e.,10 h/night),all flight parameters initially increased and then gradually dropped and FAW adults attained a total flight distance,duration and velocity equal to 63.73 km(48.42-94.12 km)(median,quartile range),24.12 h(20.87-27.73 h)and 2.73 km h^(-1)(2.13-3.33 km h^(-1)),respectively.Our work constitutes a first comprehensive assessment of S.frugiperda flight performance and provides baseline information for future efforts to forecast spatiotemporal changes in its geographical distribution,movement patterns and invasion trajectories.Such can ultimately permit a timely and targeted deployment of area-wide pest management measures against this newly-invasive pest in China and across eastern Asia.
