jan 27, 1840 - Phytophthora Infestans
(Potato Blight)
Description:
Large outbreak of phtophthora caused a mass crop failure in ireland in the 1840s which killed a million people.
Causes:
stagnant water produces this mold which can rot the roots of a plant.
Treatment:
No treatment, but can be reduced by disturbing stagnant water and better irrigation.
History:
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