New research maps the spread of potato blight in the USA between 1843 and 1845, uncovering the disease’s early impact and the mid-19th century’s responses to it, including theories of its cause and proposed treatments. Credit: SciTechDaily.com
The researchers found that the disease was first reported in 1843 in five locations in the states of New York, Pennsylvania, New Jersey, Delaware, and Connecticut. By the end of 1844 the disease had spread to 107 additional locations, a further six US states and the Canadian province of Nova Scotia.
The researchers also used their approach to characterize historical theories on the source of potato blight and remedies for treating the disease between 1843 and 1845. Proposed causes of the disease during this period included insects, weather conditions, poor quality potato varieties, and a fungus.
Together, the findings provide insight into the spread of potato blight in the USA and into public understanding of disease in the mid-19
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