STUDIES ON MACROPROPAGATION OF BANANA cv. NANJANGUD RASABALE (AAB)
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Date
2021
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University of Horticultural Sciences, Bagalkot. (College of Horticulture, Bagalkot).
Abstract
An experiment entitled “Studies on macropropagation of banana cv. Nanjangud
Rasabale (AAB) was carried out at College of Horticulture, Mysuru, during the year
2019-2020. The study was conducted to determine the effect of plant growth chemicals,
biogents and growth media on production of macropropagated plantlets and to assess
the cost effectiveness of the technology. The experiment was laid out in a Completely
Randomized Design (CRD) with three replications.
Among the various growth chemicals and bioagents studied, the treatment
combination of BAP 40ppm + P. fluorescens (T13) produced early primary bud
emergence (25 days), BAP 40ppm + T. asperellum (T12) performed well in early
secondary decapitation (15.72 days), secondary bud emergence (57.89 days), maximum
plantlet height (25.42 cm), number of leaves (5.44) and B:C ratio (2.45). The highest
shoot fresh weight (108.33 g) and dry weight (9.40 g) was obtained highest in
combination of BAP 40ppm + AMF. Treatment with IBA 0.25% exhibited the best
results in terms of root parameters. The maximum plantlet regeneration (primary and
secondary plantlets) per corm was recorded in T14 (4.44 and 12.56 respectively).
Growth media influence showed that, the FYM + Cocopeat (T6) recorded the shortest
time for primary bud emergence, secondary decapitation, secondary bud emergence
(24.2, 22.2, 62.93 days respectively), maximum plantlet height (29.58 cm), number of
leaves (4.89) and number of roots (10.89) production. Considering the maximum
primary buds per corm (4.2), secondary plantlets per corm (11), shoot fresh and dry
weight (87 g and 6.77 g respectively) and B:C ratio (2.68), the treatment combination of
Sawdust + FYM + Cocopeat (T7) was considered as the best media for
macropropagation. On an average, per plantlet cost of production using growth
chemicals and bioagents, and growth media were found to be Rs. 7.84 and Rs. 6.58
respectively; representing the macropropagation technology is economical for adoption,
even by those with limited access to resources and can able to produce acceptable
number of quality plantlets in a shorter time period.