The present investigations were carried out at vegetable Research Centre, Patharchatta, G.B. Pant University of Agriculture and Technology, Pantnagar, Distt. U.S. Nagar (Uttaranchal) duringwinter seasons of 1999-2000 and 2000-2001 in polyhouse and in spring-summer seasons of 2000 and 2001 in open in two independent experiments. The first experiment was aimed to determine optimum date of sowing by evaluating 6 dates i.e., September 16, October 1, 15, 29 and November 12 and 26 for off- season production of bittergourd inside the unheated polyhouse. The data were recorded on germination, growth and yield attributing characters. The September 16 sowing proved best ranking first with respect to most of the characters like time required for germination, main shoot length and length of laterals at 30 and 60 days stage, diameter of main shoot, days to appearance of first male and female flower, days to first harvest, fruit diameter, number of fruits anc yield per plant and per m2.
The experiment II was conducted to determine the appropriate time of transplanting or direct seeding in open for spring-summe crop. The transplanting and direct seeding were done on the samedate viz., January 15, 29 February 12, 26 and March 12. The January 29 transplanting ranked first with respect to the character viz., diameter of main shoot, position of first female flower, number cfemale flowers, sex ratio, fruit length, number of fruits and yield pe plant and per hectare. All the dates of transplanting produced MOR fruit yield than that of direct seeding.
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