The agricultural arrangement of planting one crop, and often one cultivar, over large areas year after year. It trades uniformity for efficiency, easing mechanization, standardization, and bulk trade, at the cost of collapsing genetic diversity: an entire planting shares one vulnerability to one pathogen. Ireland's dependence on the Lumper potato, the twentieth-century destruction of the Gros Michel banana, and the U.S. southern corn leaf blight of 1970 are versions of a single causal chain.
The uniformity of a crop variety is precisely where its danger lies.
—— Summarized from the thesis of the U.S. National Academy of Sciences report Genetic Vulnerability of Major Crops (1972)
History
Monoculture rose with commodity agriculture. Plantation economies demanded standardizable, bulk-tradable output such as sugar, cotton, tobacco, and coffee; mechanization in the nineteenth century and fertilizers, pesticides, and improved varieties in the twentieth rewarded uniformity further: a whole field ripening at once, one grade into store, one set of machines across it. The cost falls at the genetic level. In the first half of the nineteenth century Ireland came to depend heavily on the high-yielding Lumper potato, most of the island's crop being a single clonally propagated genotype, so that when Phytophthora infestans arrived in 1845 there was essentially no resistance (the causes of the catastrophe also include land tenure and relief policy). In the mid-twentieth century the global banana trade rested almost wholly on the Gros Michel cultivar, which Panama disease rendered commercially extinct; the industry switched to Cavendish—and new races are now closing in. In 1970 U.S. maize, widely built on one cytoplasmic male-sterile line, lost roughly fifteen percent of the crop in a single season to southern corn leaf blight, prompting the National Academy of Sciences report Genetic Vulnerability of Major Crops and the germplasm conservation programmes that followed.
Connections
Causes2
- The Columbian ExchangeenablesThe global transplantation of crops supplied the material precondition for large-scale monoculture
- The Origins of Agriculture (Neolithic Revolution)enablesAgriculture is the distant root of monoculture: domesticable species are few, and intensification narrows the crop repertoire
Consequences1
- The Great Famine (An Gorta Mór)causesDependence on the single "Lumper" potato created a technical and ecological vulnerability; the blight was the immediate trigger
Sources
- U.S. National Academy of Sciences (1972), Genetic Vulnerability of Major Crops
- James C. Scott, Seeing Like a State: How Certain Schemes to Improve the Human Condition Have Failed
- Monoculture
Open questionswell attested
- The causal link between monoculture and famine has to be considered together with land systems and relief policy, not reduced to a single cause, as the Irish Great Famine shows.
- The quotation from the 1972 report summarizes its main argument and is not verbatim.
- The Gros Michel banana was wiped out by Panama disease, and the Cavendish now grown faces a new strain, so the same pattern is still unfolding.
Why it matters
Monoculture is the agricultural version of what James Scott called seeing like a state: to make things measurable, taxable, and administrable, a complex local ecology is simplified into a tidy table. The simplification does deliver efficiency—the trouble is that what gets simplified away (mixed varieties, intercropping, local knowledge) is precisely the system's buffer. It is first an organizing and cognitive scheme and only then a set of practices: machinery, fertilizer, and breeding are means of executing that logic. Of all the routes by which technology leads to disaster, it is also the least conspicuous. The cause of death in the Irish famine is written in pathology, but its necessary condition is written in the cropping system. Catastrophe is often not one component failing, but an entire system placing all its eggs, legally, rationally, and by degrees, in one basket.