Phytolacca americana extract and application of phytolacca americana extract in preventing and treating dalbergia odorifera anthracnose

The invention discloses a phytolacca americana extract and the application of the phytolacca americana extract in preventing and treating the dalbergia odorifera anthracnose. The extract is extracted from phytolacca americana by means of ethyl acetate. The phytolacca americana extract and the application of the phytolacca americana extract in preventing and treating the dalbergia odorifera anthracnose have the advantages that the required phytolacca americana is an invasive plant and is cheap and easy to obtain, and other plant resources are prevented from being wasted; only one kind of plant is needed, a quite good preventing and treating effect can be achieved in a monothetic mode instead of a compound mode, the preparing processes are simple, and cost is low; the effective constituents are compounds synthesized by the plant, automatic degradation is achieved, resistibility caused by bacterium breeding is avoided, and harm to the environment is avoided.