The invention discloses a pharmaceutical composition for preventing and controllting diseases and
insect pests in a
seedling stage of an organic
tea garden, and also discloses a preparation method ofthe pharmaceutical composition for preventing and controlling diseases and
insect pests in the
seedling stage of the organic
tea garden. The preparation method comprises the following steps: stirringberberine, anonaine, polyoxyethylene octylphenol
ether-10 and
ethanol to obtain a premixed solution; adding
sodium bentonite into water, stirring to form
slurry, adding
octadecyl trimethyl ammonium chloride and
sodium pyrophosphate, stirring, filtering, wdusting,
drying and crushing to obtain pretreated
bentonite;
grinding the pretreated
bentonite,
eucalyptus grandis
essential oil,
tea tree oil and peppermint oil for 4-10 minutes at the
grinding speed of 10000-12000 r / min and the
grinding pressure of 1.2-1.4 MPa, controlling the grinding temperature to be less than or equal to 40 DEG C, addinga
metarhizium anisopliae agent, and uniformly mixing to obtain pretreated
essential oil; and fully stirring the pretreated
essential oil and the premixed solution, then adding a coalescing agent, uniformly stirring,
drying and crushing to obtain the pharmaceutical composition for preventing and controlling diseases and
insect pests in the
seedling stage of the organic
tea garden.