EFFECT OF MIXTURE OF CHARCOAL WITH PYROLIGNEOUS ACID ON SUCROSE CONTENT IN NETTED MELON (CUCUMIS-MELO L. VAR RETICULATUS NAUD.) FRUIT

To determine the effects of mixing charcoal with pyroligneous acid (py roligneous acid 1 : charcoal 4; Sannekka E) on sucrose synthesis in ne tted melon fruit, five experiments were carried out at 3 locations fro m 1990 to 1995. All the experiments indicated higher sucrose content i n the fruit supplemented with Sannekka E than without Sannekka E. The activity of sucrose phosphate synthase (SPS) increased as the fruit ma tured, irrespective of Sannekka E application, but the increase was hi gher in the case of Sannekka E. From the result, it is suggested that the application of Sannekka E increases SPS activity, which promotes t he synthesis of sucrose from glucose and fructose in melon fruits.