Abstract
Disease dispersion from a point source in pure and mixed stands of susceptible and resistant plants was followed by a simulation made by using the equation in respect with disease dispersion, y=are-5P. The effect of mixing of resistant plants in susceptible plants to inhibit the disease increase is reduced with the increase of disease dispersal gradient, 6, Iarger than 0.5. Infection rates calculated by the number of new lesions decrease straightly with the decrease of the proportion of susceptible plants against the logarithm of the proportion. This decrease is inhibited by the increase of disease dispersal gradient, 6. The effect of mixing of resistant plants is decreased with the decrease of spacing density. The infection rates calculated by the total number of new and old lesions give a dropping curve which is asymptotic to 0.
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Claims 5
Claim · model-written summary
Greater disease dispersal gradient above 0.5 reduced the protective effect of resistant-plant mixing.
Verbatim
e0“The effect of mixing of resistant plants in susceptible plants to inhibit the disease increase is reduced with the increase of disease dispersal gradient, 6, Iarger than 0.5”
Claim · model-written summary
New-lesion infection rates decreased as the proportion of susceptible plants decreased.
- Taxon
- plantsViridiplantaee0
- Treatment
- proportion of susceptible plantse0
- Outcome
- Infection rates calculated by the number of new lesionse0
- Direction
- decreasee0
Verbatim
e0“Infection rates calculated by the number of new lesions decrease straightly with the decrease of the proportion of susceptible plants”
Claim · model-written summary
Greater disease dispersal gradient inhibited the decline in infection rates.
- Taxon
- plantsViridiplantaet0
- Treatment
- disease dispersal gradiente0
- Outcome
- decreasee0
- Direction
- inhibitede0
Verbatim
e0“This decrease is inhibited by the increase of disease dispersal gradient, 6”
t0“Plants”
Claim · model-written summary
Lower spacing density reduced the effect of resistant-plant mixing.
- Taxon
- plantsViridiplantaee0
- Treatment
- spacing densitye0
- Outcome
- effect of mixing of resistant plantse0
- Direction
- decreasede0
Verbatim
e0“The effect of mixing of resistant plants is decreased with the decrease of spacing density”
Claim · model-written summary
Total-lesion infection rates followed a dropping curve asymptotic to zero.
- Taxon
- plantsViridiplantaet0
- Outcome
- infection rates calculated by the total number of new and old lesionse0
- Direction
- droppinge0
- Value
- 0e0
Verbatim
e0“The infection rates calculated by the total number of new and old lesions give a dropping curve which is asymptotic to 0”
t0“Plants”