By the late eighteenth century agricultural thinkers had realized the importance of crop rotation, the principle of which is that you operate a three or fourfold succession of crops: potatoes, peas and beans, brassicas, onions and leeks, and maybe others in a longer rotation. This technique obviates the possibiity of the build up of plant diseases, which occur if the same crops are grown on land year after year.
But the Irish peasants were unable to rotate crops, for their poverty forced them to grow cash crops for the English market, but the crops were not high quality and the same were grown year after year on the same piece of land. This meant that plant diseases accumulated, and there was a really nasty one, which to make matters worse was completely new to science: Phytophthera infestans, a nasty fungus that ravaged certain varieties of potato. So not only did the Irish meet a problem that they had never previously met, but they were growing a variety of potato that was susceptible to blight, the Lumper. The Lumper was a large, poorly flavoured, cheap variety which appealed to the cheapest end of the market, to people already short of corn and for whom the humble potato was a staple food. Moreover, it was the variety that was grown across the country,so when one person was hit, many were hit by the blight.
Blight is technically known as late blight to distinguish it from early blight, which is less harmful. So the Irish spent much of summer expecting a decent crop and then when funds were low found that the crop had rotted, leaving them financially devastated. Disaster!
The trouble is that blight likes conditions when light is low from dull skies and the air damp with high humidity. Conditions like these prevailed for three years from 1845 to 1848, so not only did one year's crop fail, but three years failed, but the Conservative Government persisted in its defence of the corn laws to defend the landowners' interests until the bitter end in 1846 when conditions became so dire that some of them actually developed a conscience.
At that time no one knew that the condition was caused by a fungus and that there were chemical treatments for the blight, one of which was the later developed Bordeaux mixture, which was based on copper, which is toxic to fungi. This ignorance gave rise to the misconception common among some Irish nationalists that the English had invented the disease to commit genocide against the Irish, which was never true, for they had not the technical or scientific skill to invent the disease.
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Originally potatoes were a rich man's food and the Irish poor grew potentilla, silverweed. known in Gaelic as the seventh bread, until potatoes' potential for feeding the masses was recognised.
The potato famine affected England and Wales,as well, but not as badly as it did the subsistence farmers of Ireland and Scotland, including the islands.The famine contributed to the repeal of the corn laws, which kept British corn at an inflated price, four pounds a quarter ton before imported corn was allowed into the country, a capitalist policy that caused hunger and social unrest. These laws were repealed in 1848,as they were unjust and led to hoarding by unscrupulous dealers, a malpractice that caused rioting.
frankbeswick, Thank you for the photo, practicalities and product lines.
That's a haunting photo of Ireland with the boat perhaps ready for escape from harsh times and the darker landform in the middle seeming almost broodingly a huis clos (closed door) against the similar colors of the landforms center, left and right.
Might the potato have been considered rich man's food just because it was non-native or were there other reasons?
It seems that the potato famine affected Cornwall and Scotland. But what about England, the islands and Wales?
Nightshades and potatoes belong to the Solanaceae family, as do tomatoes, so they are related.
If I recall properly there was a resistance at first to potatoes due to a similarity in appearance to nightshades. So, there would have been prior crops, a well said point you have made.
One sadly overlooked point is that prior to the cultivation of the potato the Irish [and Scots and Welsh] had grown silverweed [Potentilla anserina] known in Gaelic as the seventh bread, whose starchy root was a staple food. It is not susceptible to blight and would have fed the people. Parsnips, also, would have provided nourishment,for in England before the potato parsnip was used as a bulk vegetable as potatoes are now. You can even make parsnip chips that are just as good as potato chips. By the way, when British talk of chips we mean potatoes or other vegetables cut into this slices and fried, but not fully crisped.
I can't imagine how devastating it must have been to try to grow food for 3 years and have it all rot away. Such disasters must be lessons learned so it never happens again.
Continental drift is an ongoing process, but the period of which you are thinking was over 200 million years ago. The geological foundation of Ireland was not a factor in the famine, as blight can occur anywhere the atmospheric conditions are suitable. Last year I suffered it on my plot, whose geological conditions are unlike those in most of Ireland, for my bedrock is New Red Sandstone overlain by alluvial deposits from the River Mersey, whereas the middle of Ireland is carbniferous limestone overlain by glacial deposits.
Farming in the West is difficult not because of the underlying geological structure [excepting for the far west where the rock is precambrian rock] but because of the bogginess of the soil and the general wet conditions. Boulder clay makes working the soil difficult in places.
BSG The West of Ireland, which is largely our ancestral home apart from some ancestors from County Carlow, and also the south were the worst affected areas. All areas were affected in some way.
Ireland is very interesting geographically. Going back thousands of years, when we have the continental drifts, if you take a diagonal line from just north of Dublin down SW towards Limerick, the geological foundation is like that of the Caribbean, below that line the geological foundation is like that of South Pole! Farming can be difficult.
You make a good point about the mini Ice Age, There was also one in Tudor Times and lots of starvation then too.
Well stated as the political history of the region goes, for we have little of this history here. I appreciate you sharing this. As another contributor, would you consider the Little Ice Age of significance? It continued until the 1870 period. There is a real possibility it was caused by the sun itself, for there was a prolonged period when sunspot activity ceased, a condition associated with cooling. And the industrial revolution may have added reflective particles to the air, causing more cooling. This went on from about 1300, and has been linked to such things as the black death. So cold did the planet get that the river Thames froze over in London. I suspect it played some role in the famine, and the politics exacerbated the situation gravely.
As with most things, there is often interaction of multiple contributions that add up to a real significant problem.
One quick , was the potato famine throughout Ireland, or restricted to the part under British control?
Frank
An outstanding piece, well balanced and informative. Thank you.