The invention discloses a composite agent for preventing and treating forest diseases and
insect pests and a preparation method thereof, and relates to the technical field of forest
disease and
insect pest prevention and treatment. The composite agent is composed of a natural active extract, a synergistic auxiliary agent and a repair conditioning agent, the natural active extract comprises a
melia azedarach fruit-leaf extract, a camellia seed
meal extract, a
pinus massoniana needle leaf extract and a
camphor tree
bark extract, and the composite agent has broad-spectrum insecticidal and bacteriostatic effects; a tea residue modified penetrant and early indica rice
starch sustained-release microspheres are adopted as the synergistic auxiliaries, so that the adhesiveness and infiltration capacity of the
pesticide on waxy leaves are remarkably improved, and long-acting sustained release of active ingredients is realized; the restoration
regulator is moso bamboo vinegar, can promote the growth of new shoots of trees and the synthesis of
chlorophyll, and enhances the
stress resistance of the trees. All the components are synergistically prepared through a green process, the combined effect of multiple components is fully played,
insect and
disease prevention,
long lasting period and ecological restoration integration are achieved, and an efficient and ecologically compatible novel
plant protection technical scheme is provided for forest health management and
sustainable development.