Effect of some growth regulators and boric acid on yield and fruit quality of clementine mandarin "Citrus reticulata" [electronic resource].

Includes reference.

This study was carried out to investigate the effect of spraying Clementine Mandarin trees with 10&20 ppm of gibberellic acid (GA) , 20&30 ppm of 2,4 - D and 100&200 ppm of boric acid at full bloom stage on yield and fruit quality. It was noticed that both GA₃ treatments, as well as , the boric acid treatment at 200 ppm significantly increased the percent of fruit set, fruit retained after June drop and mature fruits (yield). In the same time, 30 ppm 2, 4-D and 100 ppm boric acid slightly, but not significantly, increased the percent of fruit set. As for the fruit shape, it may be, generally concluded that the fruit set under the effect of gibberellic acid, 2,4-D and boric acid were more elongated (width / length ratio) than that of control. Concerning fruit that of quality, the 2,4-D and boric acid treatments slightly increased, TSS% and decreased vitamin C fruit content. On the contrary it was noticed that GA₃ delayed fruit maturity and decreased TSS%.

Summary in arabic.

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