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Simulation modelling of potato virus Y spread in relation to initial inoculum and vector activity

Journal of Integrative Agriculture 2020年第2期19卷 376-388页

作者： Andrew GALIMBERTI Andrei ALYOKHIN Hongchun QU Jason ROSE School of Biology and Ecology University of MaineOronoME 04469USA Eastern New York Commercial Horticulture Program Cornell Cooperative ExtensionPlattsburghNY 12901USA College of Automation Chongqing University of Posts and TelecommunicationsChongqing 400065P.R.China

Potato virus Y(PVY)is a non-persistent virus that is transmitted by many aphid species and causes significant damage to potato *** constructed a spatially-explicit model simulating PVY spread in a potato field and used it to investigate possible effects of transmission efficiency,initial inoculum levels,vector behavior,vector abundance,and timing of peak vector activity on PVY incidence at the end of a simulated growing *** PVY incidence in planted seed resulted in lower virus infection at the end of the ***,when populations of efficient PVY vectors were high,significant PVY spread occurred even when initial virus inoculum was ***-colonizing aphids were more important for PVY spread compared to colonizing aphids,particularly at high *** early-season peak in the numbers of noncolonizing aphids resulted in the highest number of infected plants in the end of the season,while mid-and late-season peaks caused relatively little virus *** results highlight the importance of integrating different techniques to prevent the number of PVY-infected plants from exceeding economically acceptable levels instead of trying to control aphids within potato *** management plans should be implemented very early in a growing season.

关键词： potato virus Y spatially-explicit modelling aphids virus spread integrated pest management

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Mathematical modelling on phase based transmissibility of Coronavirus

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Infectious Disease Modelling 2020年第1期5卷 375-385页

作者： M.Veera Krishna J.Prakash Department of Mathematics Rayalaseema UniversityKurnoolAndhra Pradesh518007India Department of Mechanical Engineering Science Faculty of Engineering and the Built EnvironmentUniversity of JohannesburgAuckland Park Kingsway CampusJohannesburgSouth Africa

Mathematical and epidemiological simulation plays a pivotal role in predicting,anticipating,and controlling present and future *** better understand and model the dynamics of a specific infection,researchers need to consider the influence of many variables ranging from micro-hostepathogen interactions to host-to-host encounters,and the prevailing cultural,social,economic,and local customs *** reported by the WHO,a novel corona virus(COVID-19)is identified as the etiological virus through Wuhan pneumonia for unknown etiology with Chinese administration on Jan 7,*** virus is designated as an unsympathetic SARS-Cov-2 by International Commission for Taxonomy of viruses on Feb 11,*** main aim is to enlarge a phase based mathematical modelling to specify the transferability of this *** is developed Reservoir-individuals spreading set of connections modelling for imitating the prospective broadcast as of the infectivity foundation in the direction of the person *** view of the fact that,the Reservoir has set of connections to rigid to see the sights obviously as well as communal anxieties are concentrating on top of the spreading starting reservoir to *** subsequent generation matrix methodology is endorsed towards compute the fundamental reproduction number(R0)through the RP modelling to measure the transferability by the *** values of R0 are estimated from reservoir to human being as well as starting individual to individual,that is to say,the accepted quantity of less important diseases this consequence from presenting a solitary contaminated personality addicted to differently susceptible *** present model demonstrated that the spreading of COVID-19 is superior to the Middle-East pulmonary infirmity during the Middle-East nationals,analogous to harsh sensitive pulmonary infirmity,but inferior than Middle-East pulmonary infirmity within the Republic of *** can also extend this study to

关键词： COVID-19 Corona virus Phase based model Next generation matrix Reproduction number virus spread

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