1. Locoweed is a main poisonous plant in the world, and is also the most important toxic plant in grassland of China.

2. The locoweed is one of kind poisonous plants that endangers the husbandry seriously in the world, and causes enormous economic losses.

3. By analyzing the influence of artificial antigen(SW-BSA, vaccine)for locoweed toxin(SW) in immunized goats, we evaluate its safety to animal bodies.

4. This article summarized the three toxic constituent of locoweed: aliphatic nitro compound, selenium and selenide, locoweed toxin(alkaloids).

5. A pretty poison, woolly locoweed, flowering during autumn, can make cattle that eat its toxic leaves go berserk and die.

6. The topic of this paper is the present situation of locoweed in China.