A field experiment was conducted to investigate the effect of different levels of GA3 (10, 20 & 30 ppm), NAA (50, 100 & 150 ppm) and their combined dose (GA3 20 ppm + NAA 100 ppm) on yield and yield traits of cucumber at experimental plot of Horticultural Research Centre, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut during the summer season of 2014-15. The experiment was laid out in Randomized Block Design with three replications. The results revealed that combined dose of plant growth regulators (GA3 20 ppm + NAA 100 ppm) recorded significantly maximum yield and attributing characters such as plant height, number of primary branches, number of female flowers, number of fruits per plant (10.34), fruit length and fruit width at five days, fruit yield per plant (2.27 kg), fruit yield per plot and fruit yield per hectare (173.60 q) with minimum sex ratio (1:65) as compared to individual application of growth regulators. Hence, the combined dose of plant growth regulators (GA3 20 ppm + NAA 100 ppm) must be suggested for obtaining high yield of cucumber (var. Pusa Uday) under agro-climatic condition of western plain zone of Uttar Pradesh.

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