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CATEGORIES:Plant Sciences Research Seminars
SUMMARY:Optimal control of epidemics - Martin Vyska (Gilli
 gan lab)
DTSTART;TZID=Europe/London:20140501T160000
DTEND;TZID=Europe/London:20140501T162500
UID:TALK51399AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/51399
DESCRIPTION:The four main methods of controlling plant pathoge
 ns are usage of genetically resistant cultivar\, c
 ultural control\, biological control and the deplo
 yment of pesticide/fungicide. Cultural control\, t
 hat is removal of infectious hosts\, is commonly u
 sed when the other methods are not available\, in 
 particular in developing nations or in horticultur
 e. The standard practice is then roguing - wheneve
 r infectious host is discovered\, it is removed fr
 om the population. However\, because of asymptomat
 ic infections this is not always effective. In the
  case of many pathogens such as the bacterium Xant
 homonas Axonopodis\, significant improvement can b
 e achieved by proactive control. Whenever an infec
 tious host is identified\, it is removed and with 
 it all the hosts within the so called culling radi
 us. Computational models are then used to determin
 e the optimal culling radius. This type of control
  is very effective for pathogens with short-range 
 dispersal but less effective in the case of pathog
 ens with a very long-range dispersal such as Chala
 ra fraxiena. This is because when the inoculum can
  travel long distances the culling radius would ha
 ve to be unfeasibly large to stop the spread of th
 e epidemic. In this talk I will discuss several te
 chniques of modelling the spread of secondary infe
 ction and show how reduction of the host density\,
  also known as thinning\, can be used in the manag
 ement of pathogens with long-range dispersal patte
 rns.
LOCATION:Department of Plant Sciences\, Large Lecture Theat
 re
CONTACT:Megan Cooper
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