Effects of GA4+7+BA and CPPU on russeting and fruit quality in apple (Malus Ã— domestica)

Sajan Sharma; N Sharma; D P Sharma; Neena Chauhan

doi:10.56093/ijas.v90i4.102216

Authors

Sajan Sharma Dr Y S Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh 173 230, India
N Sharma Dr Y S Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh 173 230, India
D P Sharma Dr Y S Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh 173 230, India
Neena Chauhan Dr Y S Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh 173 230, India

https://doi.org/10.56093/ijas.v90i4.102216

Keywords:

Apple, CPPU, GA4 7 BA, Russet, Quality

Abstract

Apple (Malus × domestica Borkh.) production is now being affected by the changing climate which has led to reduction in quality thereby, these fruits command low returns in the market. As it is the most important temperate fruit crop of Himachal Pradesh, it still requires a great improvisation in quality. The present study was conducted in 2017-18 with various plant growth regulator practices on eight year old apple trees cv. ‘Scarlet Spur II’. Application of GA4+7+BA at 2.5 and 5 ppm when given at petal fall and two times later at 10 days interval recorded minimum russet formation (Score:1.17), increased fruit length (68.93 mm) as well as increased L/D ratio (1.07), TSS and sugar content in apple. However, CPPU at 10 ppm when applied at petal fall stage recorded higher fruit diameter (70.89 mm), fruit weight (155.56 g), fruit volume (102.94 cc), TSS (10.72 ºBrix), total sugars (9.11%) and reducing sugars (4.87%).

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