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Summary of plant diseases - chapter 12 $3.86
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Summary of plant diseases - chapter 12
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  • Course
  • Modules 1,2,3,4
  • Institution
  • OCR
  • Book
  • A Level Biology A for OCR Student Book

A concise and clear overview of plant disease in chapter 12. These notes make biology easy to understand and are a good place to start your revision and boost your grades.

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  • No
  • Chapter 12 - plant diseases
  • August 18, 2021
  • 1
  • 2021/2022
  • Summary

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  • plant diseases
  • table
  • notes
  • summary

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Disease What is it Effect
It damages leaves tubers and fruit. It can
Ring rot bacterial disease of potatoes
tomatoes and aubergines caused
destroy up to 80% of crop and there is no
cure. Once bacterial ring rot infects the
by the gram-positive bacteria field it cannot be used to grow potatoes
Clavibacter michiganensis. again for at least two years




Damages leaves flowers and fruit stunting
Tobacco mosaic virus A virus that infects tobacco
plants and around 150 other
growth and reducing yields and can lead to
an almost total crop loss. Resistant crop
spaces including tomatoes strains are available but there is no cure.
peppers cucumbers petunias and
delphiniums. Spread by aphids.

The hyphae penetrate hostiles destroying
Potato blight Caused by the fungus-like
protoctist oomycete. - air borne
leaves tubers and fruit causing millions of
pounds worth of crop damage each year.
There is no cure but resistant strains,
careful management and chemical
treatments can reduce infection risk



The hyphae penetrate and digest the cells
Black sigatoka A banana disease caused by
fungus (mycosphaerella fijiensis)
turning the leaves black. If plants are
infected it can cause a 50% reduction in
which attacks and destroys the yield. Resistant strains of being developed
leaves good husbandry and fungicide treatment
can control the spread of the disease but
there is no cure

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