An experiment entitled "Effect of GA3 and NAA on yield of Bottle Gourd Lagenaria siceraria) cv (MGH-4)" was conducted at Horticulture Research Field, Department of Horticulture, Naini Agricultural Institute, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj during year 2019 on bottle gourd cv. warad (MGH-4) with two growth regulators having, concentration NAA (30, 40, 50, 60, 70, 80 ppm) and GA3 (30,40, 50, 60, 70 ppm). Water was used as a control. All the treatments were replicated three times in a randomized block design keeping plot size of 2m x 2m. The seed sowing was done on 30 March, 2019 maintaining a planting distance of 2×1m. The application of plant growth regulators significant affects the vegetative as well as reproductive attributes of the crop. The growth regulators were sprayed at two leaf stage and four leaf stages. Application of 40 ppm gibberellin at 2, 4 leaf stage was found most effective, in terms of number of female flowers per vine (17.08), fruit per plant (12.25), fruit yield per plant (14.61 kg), fruit yield per hectare (58.45 t/h)respectively among all the different treatments.

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