The invention belongs to the technical field of pesticides and particularly relates to a biological
pesticide for vegetables and a preparation method thereof. The active ingredients of the biological
pesticide for vegetables are prepared from, by weight, 40-60 parts of purslane, 25-45 parts of
rhizome of Japanese fleeceflower, 30-40 parts of
tobacco leaf, 28-56 parts of
rhizome of tatarinowii sweetflag, 15-35 parts of
alum, 20-30 parts of root of devalay
gerbera, 30-40 parts of root of common peony, 10-20 parts of heartleaf
houttuynia, 11-22 parts of belvedere fruit, 22-40 parts of sweet wormwort, 18-36 parts of root of common threewingnut, 15-35 parts of root of Chinese pulsatilla, 10-20 parts of fruit of
Chinese hawthorn, 10-20 parts of clove, and 3-6 parts of a suspending agent. The biological
pesticide for vegetables has the advantages of good effect and zero toxic and side effects, has significant pest-expelling, fungicidal and pesticidal effects, can prevent
disease and pest damage during vegetable growth and prevent
pesticide resistance, can even promote the growth of vegetables and the absorption of nutrients in soil, and may act as an ideal environment-friendly agricultural vegetable protectant.