Fruit Physical Attributes as Affected by Russet Management Chemicals in cvs. Red Velox and Golden Clone-B

Author: Tabish Jehan Been, Mohammad Amin Mir, Abdul Raouf Malik, Sajad Ahmed Bhat, Sajad Majeed Zargar, Arshad Hussain Mughal, Iftisam Yaseen, Shaila Din, Aamina Sadiq and Nazish Farooq Mir

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Abstract

The present investigation was conducted in the Experimental fields of Division of Fruit Science, SKUAST-K, Shalimar during the year 2022-23. Five year old trees of exotic apple cvs. “Red Velox” and “Golden Clone-B” grafted on M-9 T337 rootstock, planted at a distance of 3m × 1m were selected for experimentation. The experiment was laid out in Randomized Block Design (two factorial). The first factor was the russet management chemicals which include Control, Gibberellic acid4+7 + 6- Benzyladenine (@ 5.5 ppm, 11 ppm and 21ppm), Gibberellic acid3 + 6- Benzyladenine (@ 5.5 ppm, 11 ppm and 21ppm) and Chlorogenic acid (88.5 ppm, 177 ppm and 354 ppm). Timing of the spray was at 80% petal fall and 15 days after the first spray for Gibberellic acid4+7 + 6-Benzyladenine (@ 5.5 ppm, 11 ppm and 21ppm) and Gibberellic acid3 + 6-Benzyladenine (@ 5.5 ppm, 11 ppm and 21ppm). However, it was 30 days after the full bloom for Chlorogenic acid (88.5 ppm, 177 ppm and 354 ppm). The second factor was the varieties i.e., Red Velox and Golden Clone-B. Timing of the spray was @ 80% petal fall and 15 days after the first spray for G0-G3 and G7-G9. It was 30 days after the full bloom for G4-G6. Among all the applied chemicals, best results for the physical characters were recorded in G3: GA4+7 + 6-BA @ 21 ppm in which maximum fruit length (71.98 mm; 79.89 mm), maximum fruit diameter (77.08 mm; 79.65 mm), maximum length/diameter ratio (0.94; 1.00) and maximum fruit weight (205.03 gms; 221.95 gmswas recorded in the two varieties i.e., Red Velox and Golden Clone-B respectively. Chlorogenic acid @ 177 ppm was also found to be statistically at par with G3: GA4+7 + 6-BA @ 21 ppm for the above mentioned parameters when it was applied at 30 DAFB. The present investigation concludes that GA4+7 + 6-BA @ 21 ppm can be recommended for controlling the russet apart from improving the physical attributes of the cvs. Red Velox and Golden Clone-B. At the same time, Chlorogenic acid should be considered for further research and shouldn’t be recommended to the farmers as of now because of its costly nature

Keywords

russet management, GA3+ 6-BA, GA4+7 +6-BA, physical characters, chlorogenic acid, Red Velox, Golden Clone-B

Conclusion

From the present research findings, it can be concluded that treatment G3 i.e., GA4+7 + 6-BA applied at a concentration of 21 ppm at 15% petal fall (15 DAFB) and at 30 DAFB proved to be the best for controlling russet in both varieties, i.e., Red Velox and Golden Clone-B apart from improving the physical attributes of the fruit, i.e., fruit length, fruit diameter, L/D ratio, fruit weight and fruit firmness

References

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How to cite this article

Tabish Jehan Been, Mohammad Amin Mir, Abdul Raouf Malik, Sajad Ahmed Bhat, Sajad Majeed Zargar, Arshad Hussain Mughal, Iftisam Yaseen, Shaila Din, Aamina Sadiq and Nazish Farooq Mir (2024). Fruit Physical Attributes as Affected by Russet Management Chemicals in cvs. Red Velox and Golden Clone-B. Biological Forum – An International Journal, 16(11): 87-94