Effects of Plant Growth Regulator on Yield and Economic Benefit of Sweet Pepper (Capsicum annum L.)

Abstract

The experiment was conducted in the Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh. Plant growth regulators were applied which had significant effect on yield of sweet pepper (Capsicum annum L.). The experiment consisted of two factors. Factor A: Plant growth regulators (four levels) as G0: Control, G₁: Gibberellic Acid (GA₃) @ 30 ppm, G₂: 4-Chloro Phenoxy Acetic Acid (4-CPA) @ 45 ppm and G₃: 4-Chloro Phenoxy Acetic Acid (4-CPA) @ 45 ppm + Gibberellic Acid (GA₃) @ 30 ppm and Factor B: Number of spray (three levels) as N₀: Control (no spray), N₁: two spray, N₂: three spray. In case of plant growth regulators, the highest yield (27.77 t/ha) was found from G₃ treatment, whereas the lowest (18.87 t/ha) was from G₀ treatment. For number of spray the maximum yield (26.0 t/ha) was recorded from N₂ treatment, while the minimum yield (19.87 t/ha) was from N0 treatment. The results indicated that the highest yield (31.8 t/ha) was observed from G₃N₂ treatment combination, while the lowest yield (17.5 t/ha) was from G₀N₀ treatment combination. Due to combined effect, the highest yield (31.8 t/ha) with net income (Tk/ha 1416558) and BCR (2.46) was observed from G₃N₂ treatment combination, while the lowest yield (17.5 t/ha) with net income (Tk/ha 433045) and BCR (1.49) from G₀N₀ treatment combination. Thus, three times spray with (4- Chloro Phenoxy Acetic Acid + Gibberellic Acid) may be recommended for achieving the higher growth, yield and economic benefit of sweet pepper.

The Agriculturists 2018; 16(2) 58-64