It was 1930s and the last thing the depression era needed was an invasive plant that took over farmland and pastures. The Klamath weed, or goatweed, a native of Europe, first appeared in the United States in 1793 near Lancaster, Pennsylvania. By 1900 it had reached California in the vicinity of the Klamath River, hence the name locally given to it. By 1929 it had occupied about 100,000 acres of rangeland, and by 1952 it had invaded some two and one half million acres. Livestock consuming “the weed” became sore-mouthed and lost weight so the government and chemical (pesticide) companies took action! Tons of herbicides like 2,4-D (a component of the notorious chemical weapon called “Agent Orange”)1 were used and millions of dollars were spent to control the weed with little success. Local rivers and soil were contaminated with the harmful chemicals that accumulate in animals and humans and can cause neuroendocrine disruptions (More details in my article Do Pesticides Impact Fertility, Masculinity and Miscarriages? An Overview of Scientific Literature).
The “invasion” problem was finally solved when species of beetles (native to southern France) were imported in 1944, that mainly fed upon the “weed.”
In her 1962 book Silent Spring, Rachel Carson discusses Klamath weed as an example of how poorly researched chemical approaches to pest control can have unintended negative consequences. But today, we know the yellow-flowered perennial Americans called Klamath “weed” was called St. Johns Wort (Hypericum perforatum) in Europe with amazing medicinal and therapeutic properties!
The herb St. John’s Wort (SJW) now sells for $20 a pound and in concentrated pill for $100 a pound! This is the same plant that Californians spent millions of dollars to (unsuccessfully) eradicate by contaminating their precious soil and water resources!
The herb, when organic and untreated, is used for relief of menopausal symptoms, such as hot flashes, treatment of insomnia, depression, nerve pain (neuralgia) and wounds.







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