Generally speaking, castor seeds are generally used in industry, but the roots and fibers of castor are not used much. The real toxic places of castor are castor seeds and castor leaves. So this is also the reason why many rural people don't grow castor. The children in the village are naughty and afraid of danger. When I was a child, the axles of ox carts in rural areas were all lubricated with castor oil, and the ground was fertilized with oil residue after oil extraction. But now it's tractors and cars, so you can use it directly when you buy lubricating oil. It doesn't need to be used in the wild now. It is much better to use chemical fertilizers and pesticides directly than castor oil residue.
Although castor is widely used in China, it is unrealistic to grow castor by farmers themselves. After all, if farmers grow their own crops in the fields, the quantity is too small, and the quality is also a problem. It is better to plant directly on a large scale and then harvest mechanically. Because a small amount has no economic benefits, and castor oil is used less in rural areas. So there is no race castor in the countryside. In the past, there were two more factories in my hometown. As a result, parents were afraid that their children would eat indiscriminately and shoveled them.
But in medicine, castor leaves and stems are good medicinal materials. It is usually used to treat arthritis and tetanus. In addition, some remedies based on castor can also be used to treat common diseases such as cough. It is said that castor oil can also treat constipation, but I have never seen anyone treat it this way.