Author: Neha Sharma, Anil Godara, Amit Sharma and Ankit Gavri
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An experiment was carried out to find the effect of wedge grafting success on different age of rootstock under different growing environment at CCS Haryana Agricultural University, Hisar during the year 2016-17 & 2017-18. The experiment was laid out in CRD with nine treatments and three replications to find out the suitable age for successful wedge grafting with polycap of guava rootstock cv. L-49 under different growing conditions (Open condition, Shade net 50% and Greenhouse) with different age of rootstock (8, 12 and 16 months). The results revealed that under greenhouse (temp. - 25±5ºC, Relative humidity - 70-80%) more than 12 month old rootstock takes minimum days were required for successful grafting, maximum successful grafting percentage, max. number of sprouts on rootstock, maximum number of leaves on scion and max. increase in scion length (cm), leaf area, fresh and dry weight of shoot-root followed by shade net at 8 months. This might be due to humid climatic condition played an important role in early contact of cambium layer of stock and scion resulting in easy callus formation and initiation of subsequent growth and less fluctuation between maximum and minimum temperature contributes to high success of graft union and further growth of grafts. In the experiment, the interaction between growing conditions and period after grafting was found significant. Present results suggest that highest number of spourts on rootstock, successful grafting percentage, number of sprouts on rootstock, number of leaves on scion, increase in scion length (cm), leaf area, fresh and dry weight were found best under greenhouse on 12 month old seedling followed by shade net 50%.
Guava, Rootstock age, Greenhouse, shade net, Wedge grafting
Based on the results of present investigation can be concluded that the relative humidity is major factor, which along with temperature, wind speed and lux hour influence successful wedge grafting in guava. With proper monitoring of such weather factors it may be possible to predict that protected condition for guava propagation on 12 month age rootstock can be utilized for further improvement in the technique for wedge grafting under greenhouse followed by shadenet -50% with polycap.
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