DAMINOZIDE APPLICATION METHOD EFFECT ON GROWTH AND CONTENTS OF OLEANDRIN AND RUTIN OF OLEANDER (NERIUM OLEANDER L.)

This study included one factor with four growth retardant application methods of daminozide at 500 mg.l-1 concentration (without addition, sapling base soaking, drench, and spraying methods) on oleander sapling four months age. The experiment was conducted in a lath-house, Department of Horticulture and Landscaping, College of Agriculture, Tikrit University, during the growing season of 2016. The experiment was designed in a complete randomized design with three replications. The results showed that daminozide applications caused a significant effect in growth characteristics. Drench application gave less plant height 62.87 cm. Spray application resulted in the highest chlorophyll content (10.61 mg.g-1 fresh weight). Highest content of oleandrin was 0.25 mg.g-1 and 47.82 mg.kg-1 of rutin to sapling base soaking treatment.