S. Padmapriya* and R.M. Vijayakumar
TNAU, Coimbatore -3
Email: spadmapriyaa@yahoo.co.in
Received-05.01.2022, Revised-21.01.2022, Accepted-28.01.2022
Abstract: The current investigation was carried out to study the suitability of different methods of grafting under different growing seasons in guava for year round production of quality planting material. The experiment was carried out at the College Orchard, TNAU, Coimbatore during the year 2018-19. The experiment was carried out using FRCD with three replications. Different methods of grafting viz., approach grafting (G1), wedge grafting (G2) and side grafting (G3) at three different seasons of grafting viz., Oct-Nov, 2018 (S1), Feb- March, 2019 (S2) and June- July, 2019 (S3) were experimented. The study showed that there was great scope for clonal multiplication of guava through grafting techniques. The results of the experiment indicated that, among the three methods of grafting, Wedge grafting performed during the month of Oct-Nov, 2018 (G2S1) registered lesser days taken for bud sprouting (19 days), first leaf emergence (24.70 days), highest graft success percentage (82.65) and increased leaf area (44.04cm2) as compared to other methods of grafting. Likewise, wedge grafting done during the month of June-July, 2019 (G2S3) exhibited improved graft survival percentage (72.28), highest sprout length (11.11cm) and no. of leaves per graft (30.5). With regard to the biochemical parameters, wedge grafting performed during June-July, 2019 (G2S3) recorded highest chlorophyll content (24.40 SPAD unit), photosynthetic rate (16.26 μmol CO2 m-2 s-1) and lowest phenol contents (3.16 mg g-1). Microtome studies also indicated a strong graft union in wedge grafted plants.
Keywords: Guava, grafting methods and season, graft success and survival percentage, chlorophyll, phenols, microtome studies
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