Effect of Sodium Hypochlorite (NaOCI) on Off-Season Flowering in Longan (<I>Dimocarpus longan </I>Lour.) cv. Daw

Abstract

The effect of sodium hypochlorite on off-season flowering in Longan (Dimocarpus longan Lour.) cv. Daw was conducted at Lampang Agricultural Research and Training Center, Lampang Province, during August to November 1999. The one year old longan trees were grown in 20 liter filled with soil. The sodium hypochlorite was soil applied 0, 0.5, 2.5, 5.0 and 10 g/pot. The experiment was arranged into Completely Randomized Design. The result revealed that flower emergence after treated with sodium hypochlorite at 0.5, 2.5, 5.0 and 10 g were 33.33, 100, 100 and 66.66% respectively, while untreated tree showed no flower emergence. Plants treated with sodium hypochlorite at 0.5 to 10 g required time for flower emergence at the average of 28 to 34 days after application and at the rate of 2.5, 5 and 10 g resulted in longer of panicle than 0.5 g.