Effect of Foliar Spray of Polyamines and Biostimulants on Rose (Rosa hybrida L.) under Polyhouse Condition

Investigation was done to find out the effect of different polyamines viz., spermine and spermidine (5, 10, 20 mg/l) and biostimulants viz., 2 % Novel (banana pseudostem sap) and 2% cow urine as foliar spray on growth parameters of rose var. Top Secret.

Plant height, number of branches and number of leaves were found to be significantly higher with foliar spray of polyamines and biostimulants. Maximum plant height was found in plants treated with 20 mg/l spermidine while number of branches were found maximum in plants treated with 20 mg/l spermine. Maximum number of leaves were observed with 20 mg /l spermine and were at par with 10 mg/l spermine and 20 mg/l spermidine.

Flower stem length and stem diameter were significantly maximum with treatment 20 mg/l spermine, at par with 10 mg/l spermine and 2% novel. Bud diameter was significantly higher with treatment of 10 mg/l spermine, 20 mg/l spermine, 20 mg/l spermidine and 2% novel while bud length and flower diameter were maximum in 20 mg/l spermidine. Chlorophyll and anthocyanins pigments were observed maximum in plants treated with 20 mg/l spermine followed by 2% Novel spray. Further, plants treated with 2% Novel showed maximum flower yield (16.98 flowers/plant) as well as vase life (8.53 days).