Impact of Flower bud inhibition on Flowering and Fruiting in Plum cv. Kala Amritari using GA3
Rajput Vinita*, Bhatia S.K., Sharma Suneel, Kumatkar R.B., Ravika1
Department of Horticulture, College of Agriculture, CCS Haryana Agricultural University, Hisar-125004, Haryana, India
1Department of Genetics and Plant Breeding, College of Agriculture, CCS Haryana Agricultural University, Hisar-125004, Haryana, India
*Corresponding author: Vinita Rajput, Department of Horticulture,College of Agriculture, CCS Haryana Agricultural University, Hisar-125004, Haryana, India, E-mail: email@example.com
The self fertile cultivars of Japanese plums such as Kala Amritsari suffers with heavy flowering and fruiting which leads to poor quality fruit production. Manipulation of crop load can be an effective way to achieve the desired fruit yield of good quality. It can be achieved by flower and fruit thinning, manually and chemically. In recent years, research on flower buds inhibition is being conducted in different fruit crops using hormones like gibberellins. In this study, selected trees were sprayed with GA3 solutions (0, 25, 50, 75, 100 ppm) before the leaf fall stage in the year 2015 and 2016. GA3 applications delayed full bloom stage and fruit set stage. It was observed that increasing concentration of GA3 reduced the number of flowers (137.50, 144.00); fruit set (31.60%, 30.72%) and thereby number of fruits per shoot, significantly in both years being minimum with GA3 at 100 ppm. The reduced flower buds and crop load lead to increase in fruit weight (15.68g, 13.98g), but decrease in total yield (40.13 kg/tree, 39.76kg/tree) with GA3 100 ppm applications in both years followed by GA3 at 75ppm. The quality parameters also improved with GA3 application but were observed maximum with GA3 at 75 ppm.