Effect of Training Method and Spraying Gibberellic and Salicylic Acid on Some Flowers Characters of Snapdragon Plants Antirrhinum majus L.

Abstract

The experiment was conducted at research station of the Horticulture and landscape department/ Agriculture college/ Diyala university during 2017- 2018 seasons (8/10/2017- 4/5/2018). The objectives of the experiment were to investigate the effect of training method , training method included four types (single stem, double stems , three stems and four stems). Gibberellic acid sprayed with two concentration (100 , 200 mg.L^{- 1}) also salicylic acid sprayed with two concentration (50, 100 mg.L^{- 1}) and control treatment sprayed two times with distilled water in 15/1/2018 and 15/2/2018.

Training methods had significant effects on floral growth characteristics, Single- stem training method had the best regarding days number for inflorescence emergence 131.44days, inflorescence length 44.87cm, inflorescence diameter13.39cm, florets number on inflorescence 46.01 Floret/spike, flowering stem length 86.59cm, flowering stem diameter 10.20mm and petals anthocyanins content 28.30mg/l dry weight. give spraying 100 mg/l of gibberellic acid had best results regarding inflorescence length 44.88cm, inflorescence diameter 13.26cm, florets number on inflorescence 50.47 floret/spike, flowering stem length 81.64cm, flowering stem diameter 10.88mm. give spraying 100 mg/l of Salicylic acid had best results regarding days number for inflorescence emergence 132.66days and petals anthocyanins content 28.65 mg/l dry weight. Interactions between the studied factors had significant effect in all studied characteristics.