Organic pesticides are usually considered as those pesticides that come from natural sources. They are usually minimally processed. These natural sources are usually plants or minerals. There are also microbial pesticides.
Poisonous plants are a major cause of economic loss to the livestock industry. Two poisonous plants common to Oregon are poison hemlock and Western water hemlock. Ingestion of either by humans or livestock typically results in death.
Poison oak plants contain a chemical that causes a severe rash. Learn how to spot a plant, safely remove, and clean your clothes, gear and skin afterward to prevent a rash.
Poisonous plants in pastures and hay pose a hazard to livestock. Learn how to identify toxic plants and what steps you can take to prevent livestock from consuming them.
Silage-making has been used to reduce the concentrations of toxins in a variety of crops. But in the case of poison hemlock, the opposite is true — making silage out of it actually increases one of its toxic alkaloids.
Rangeland, pastures and hay fields throughout Oregon often contain poisonous plants that are dangerous to livestock. Poisonous plants, however, can be avoided or managed in a variety of ways to limit livestock losses.
These publications are shared to teach farmers and agriculturalists how to properly control weeds and poisonous plants and pests. Handbooks and management fact-sheets are provided as well as a list of common pasture weeds, poisonous plants, and other pests that affect pastures.