Spinosyn/emamectin benzoate microsphere and preparation method thereof

The invention discloses a biodegradable spinosyn/emamectin benzoate microsphere and a preparation method thereof. According to the microsphere prepared in the invention, a core material is wrapped with biodegradable materials such as polylactic acid, polycaprolactone, and stearic acid; the microsphere has the advantages of safety, low toxin, high efficiency, long lasting period, and good stability, and has the advantage of good environment compatibility when compared to microcapsules with polymer wall materials most used currently. Meanwhile, aiming at the problem that drug release is too fast or too slow for most products with a single wall material, the method of the invention realizes adjusting control of the microsphere slow release performance by changing the ratio of polylactic acid, polycaprolactone and stearic acid in the wall materials.