Green prevention and control method for scale insects

The invention relates to the technical field of pest control, in particular to a green scale insect control method which comprises the following steps: A, uniformly mixing elaeagnus angustifolia leaves, brown sugar and water to obtain a mixed solution, and sealing the mixed solution in a container; and B, exposing the container in the step A under the environment temperature condition of 27-32 DEG C, and exhausting gas in the container to obtain the elaeagnus angustifolia leaf plant source preparation. And C, filtering the elaeagnus angustifolia leaf plant source preparation obtained in the step B, diluting and spraying to scale insects on plants, so as to solve the industrial technical problems of excessive agricultural product pesticide residues, incomplete control and serious non-point source pollution existing in scale insect control in the existing crop production, so that the production cost is reduced on the premise of ensuring that the agricultural products are pollution-free. The safe, efficient and