Effect of plant growth regulators on growth, yield and fruit quality of strawberry (Fragaria x ananassa Duch.) under protected conditions

Abstract

A field trial was conducted during 2015 and 2016, to study the effect ofgrowth regulators on growth, flowering, yield and fruit quality of strawberry cv. Chandler. The experiment was laid out in completely randomized design with 16 treatments viz.CPPU at 1, 2 and 4 ppm, GA3 at 25, 50 and 75 ppm, Promalin at 2, 4 and 6 ppm, GA4+7 at 5, 10 and15 ppm, NAA at 10, 20 and 30 ppm and control (water spray) and each treatment was replicated thrice. The results revealed that the plants sprayed with 15 ppm GA4+7 two weeks before flowering significantly reported highest plant height (33.43 cm), leaf area (239.70 cm2), number of flowers (31.94), fruit set (87.45 %), number of fruits per plant (29.02), yield (540.01 g/plant), fruit length (53.63 mm) and fruit diameter (37.19 mm) and fruit weight (23.70 g) as compared to control. This treatment resulted in 196.36 % increase in yield and 56.22 %in fruit weight over control. Plants sprayed with 6 ppm promalin also showed significant improvement in vegetative growth, fruit size, yield and fruit quality, which resulted in 137.92 % increase in yield and 51.81 % increase in fruit weight over control. Hence, it is concluded that foliar spray of 15 ppm GA4+7 applied 2 weeks before flowering is beneficial in improving growth, yield and fruit quality of strawberry plants.

Influence of NAA and GA3 on Yield and Yield Attributing Parameters of Strawberry (Fragaria x ananassa Duch.) cv. Sabrina under Net Tunnel

“…Application of Gibberellic acid 75 ppm significantly increased the average volume of fruit. Similar observations on fruit volume were also reported by Khokhar et al, (2004), Saima et al, (2014) and Thakur et al, (2015).…”

“…The maximum fruit width (3.40 cm) was recorded under T 3 (RDF + Gibberellic acid 75 ppm) which was recorded superior and significant differences among all other treatments under present investigation and followed by T Kumar and Tripathi (2009) and Tripathi and Shukla (2010) in strawberry. Khokhar et al, (2004) and Thakur et al, (2015).…”

Effect of Gibberellic Acid Concentrations and Runners' Removal Rates on Yield and Quality of Frigo Strawberry Plantations

“…While TSS was no significant for mother and runners in both seasons. The result are confirmed with Sharma and Singh, (2009), Ouzounidou et al, (2010), Kazemi et al, (2014 and Thakur et al, (2015). Perkins-Veazie, (1995) reported that SSC (soluble solid content) of strawberry fruits varied from 4-11% depending on cultivars and environment.…”

“…In another study Kumar et al, (2012) showed that strawberry plants which is treated with 75 ppm of gibberellic acid showed an increase in all vegetative growth characteristics viz., plant height, petiole length, number of leaves, plant spread and leaf area Index. Foliar application of strawberry plants with GA 3 increased TSS and Vitamin c in their fruits (Sharma and singh, 2009, Kazemi et al 2014, and Thakur et al 2015.…”

Effectiveness of Plant Growth Regulators on Vegetative Growth of Strawberry cv. Camarosa

“…The height of the plants during present investigation due to application of GA3 @ 250 ppm which increase the cell elongation and cell division (Rademabher, 2000). The above results are confined with work of Dwivedi (1987), Mohammed et al, (1990), Thakur et al, (2017).…”