The invention discloses a synergistic bio-composite insecticidal
pesticide for gardening and a preparation method thereof. The
pesticide is prepared from, by weight, 16-25 parts of extract liquid of
euphorbia helioscopia, 8-14 parts of
bergenin std., 6-11 parts of extract of
pyrethrum cinerariifolium, 7-11 parts of attapulgite
powder, 3-5 parts of
sophora flavescens alkaloids, 4-7 parts of chili,2-6 parts of folium artemisiae argyi, 15-21 parts of
euphorbia nematocypha, 7-12 parts of tea
saponin, and 6-12 parts of pumpkin leaves. In the invention, by means of effective ratio of the extract liquid of
euphorbia helioscopia, the
bergenin std., the extract of
pyrethrum cinerariifolium, the attapulgite
powder, the
sophora flavescens alkaloids, the chili, the folium artemisiae argyi, the euphorbia nematocypha, the tea
saponin and the pumpkin leaves, the
pesticide is produced. The preparation method is simple. The pesticide has significant effect of killing pests and has no residue, is freeof polluting soil,
water source and crops, can be degraded in
natural environment, is free of damage on human and animals and generation of
drug resistance in pests, is prepared from natural raw materials and is toxic-free, and has good insecticidal effect when being directly applied to flowers.