PratibhaArya, Ganesh Chandra2022-10-062022-10-062022-08https://krishikosh.egranth.ac.in/handle/1/5810188641The current study was conducted at the Horticulture Research Centre Patharchatta, G.B.P.U.A.T., Pantnagar, Udham Singh Nagar (Uttarakhand) for “Standardization of time and environmental conditions for wedge grafting in jackfruit (Artocarpus heterophyllus Lam.) cv. Pant Garima under tarai conditions of Uttarakhand”. The experiment was laid out in three factorial randomized block design with three replications per treatment. The 12 treatment combinations consisting of three time of grafting T1 (25th February), T2 (10th March) and T3 (25th March), two growing conditions C1 (under open condition) and C2 (under shade net condition) and two conditions for use of polycap P1 (with the use of polycap) and P0 (without the use of polycap). The results obtained from the experiment revealed that there were significant influence of time, environmental conditions and uses of polycap on success and survivality of wedge grafting in jackfruit cv. Pant Garima. Among different treatments wedge grafting done in second fortnight of March under shade net condition with use of polycap was found to be most effective as compared to the other time and condition of grafting with respect to the following attributes such as minimum time taken for bud sprouting (15.10 days), graft bud sprouting percentage (62.23%), percentage of graft success at 30, 60 and 90 days after grafting (72.58%, 69.01% and 62.86% respectively), minimum time taken for feather emergence (24.63 days), number of leaves at 60 and 90 days after grafting (9.64 and 12.94), leaf area index (4.54), fresh weight of shoot (31.29 g), dry weight of shoot (16.16 g), length of primary root (13 cm), length of secondary root (29.36 cm) and fresh weight of root(15.22 g). However, the minimum success was obtained in second fortnight of February under open condition without polycap for all the attributes. Based on the above study, it could be concluded that wedge grafting done in second fortnight of March under shade net condition with polycap uses in jackfruit cv. Pant Garima will be beneficial for obtaining higher success and survivality rate in very less time under tarai condition of Uttarakhand. As the above findings were based on the one-year data further experiments are required to strengthen the above findings.EnglishThesis