Impact of Thidiazuron, Malic and Citric Acids on Growth and Flowering of Rosa Hybrida L. CV. 'Arthur Bell'

The experiment was carried out in one of the fields affiliated to the Baqubah Nursery Research Station /Diyala Agriculture Directorate. The experiment was conducted for the period from 1/10/2020 to 10/6/2021, to study the effect of foliar spraying with thidiazuron (TDZ) at concentrations 1,2 and 4 mg L-1 in addition to spraying with distilled water as a comparison treatment, and foliar spraying with organic acids, Malic acid (MA) at concentrations 150 and 300 mg L-1, and citric acid (CA) at concentrations 150 and 300 mg L-1, in addition to spraying with distilled water as a comparison treatment, on growth and flowering of Rosa hybrida L., cv. "Arthur Bell" with yellow flowers, The experiment was carried out according to a randomized complete block design (RCBD) as a factorial experiment (4×5) with three replications.