Several acetone and ethanol plant extracts exhibit acaricidal activity at a 1% concentration. The acetone stem extract from Cissus quadrangularis had a similar efficacy to that of chlorfenvinphos (CM = 100) at a 0.03% concentration. The ethanol leaf and flower extract from Calpurnia aurea also had a similar efficacy to that of chlorfenvinphos (CM = 100) at a 0.03% concentration.