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disease in plants (preformed 预成型 (cuticle may contain waxes, stomata…
disease in plants
preformed 预成型
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stomata (small, open too late)
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late blight of potatoes
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tubers
purple-black, tan(inside),rot
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- inoculum to plant surface
- germination&growth of pathogen
3.penetration of host tissue: wounds, stomata, surfaces pierced.
- infection of internal plant tissue
- reproduction of the pathogen
- dispersal of the spores
- survival of the pathogen while the host is dormant or absent
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