Modelling studies: 1' Germination

1
Modelling studies 1. Germination infection
(December 1998)

• Stephen Cox

2
Diffusion model

• finite difference model with up to 7 layers

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Germination 24 hours
4
Germination 48 hours
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Germination 72 hours
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Effect of logP
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Effect of logP
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Germination response

• Dinocap moves in the cuticle so a simple
  2-dimensional diffusion model will suffice
• Kinetics of Insecticide Action. Part V
  (Salt and Ford, 1996)
  response model should be applicable to the effect
  of Dinocap on germination

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Infection response

• concentration profiles derived from infection
  response experiment assuming that the edge of
  infection occurs at a constant concentration

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Infection response

• the situation with mycelia is complicated
• since Dinocap is used to control germination
  there is little point in pursuing complicated
  models
• a better experiment would start off with a carpet
  of mycelia

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Fluquinconazole

• spread in a living wheat leaf over a number of
  days

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Fluquinconazole

• the movement with time under a flow displays the
  same shape as the experimental results

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Parameters

• parameters were chosen for rapid transport
• the 3-layer form of the model was also used