Poisonous Hogweed. Have you spotted any in your fields?
A poisonous plant that can cause boils and blindness.
The sap is photosensitive, which means it becomes even more toxic when exposed to sunlight. People should immediately wash the area with soap and cool water and go to the hospital if the sap touches their skin, she said. Hogweed can also cause temporary or permanent blindness if the sap comes into contact with eyes.