... acts as a growth inhibitor at higher concentration. Naphthalene acetic acid (NAA) white crystal,content:98.5%,MP:130-132 Degree ... , guavas, mangoes, water melons, pawpaws, citrus fruits, aubergines, cucumbers, cotton, soya beans, ectØ To imporve setting in fruitØ As a fruit ... fruit and other crops, improve the setting flowering. Naphthalene acetic acid ,NAA