Rhododendron capitatum miscellaneous terpenoids, extraction method and application

The invention discloses a rhododendron capitatum miscellaneous terpenoids compound, an extraction method and application, and the rhododendron capitatum miscellaneous terpenoids compound is prepared by the following steps: crushing the overground part of rhododendron capitatum by using a natural pharmaceutical chemical research method, and performing hot reflux extraction in alcohol to obtain a total extract; and extracting the total extract with ethyl acetate, and carrying out repeated column chromatography separation on the obtained ethyl acetate extract phase to obtain the six meroterpenoids. The compound disclosed by the invention is simple in preparation method, and experiments prove that the compound disclosed by the invention has relatively good antibacterial activity on plant bacteria such as kiwifruit canker pathogen and bacillus cereus, also has good antibacterial activity on pathogenic bacteria such as staphylococcus aureus, and is safe to environment, human, livestock and other beneficial organism