2-(3-Chlorophenoxy)-propio nic acid(Cas#101-10-0), 3-CPA, Cloprop, is a plant growth regulator for pineapple.Soluble in meth anol, ethanol, tol uene, dimethylformamide and dilute alkaline solution, insoluble in water.Mainly used for suppression of pineapple crown shoot growth; Increase fruit size and fruit weight;Stimulate root growth and increase fruit setting rate.Pineapple harvest 15 weeks before the last batch of flowers wither, Corolla long and 3-5 cm, with 240-700 g/1000 kg ha water sprayed Crown roof postponing maturity.