Effect of foliar application of boron on the growth and yield of green chili (Capsicum annum L.)

A field study was performed at the Bangladesh Institute of Nuclear Agriculture (BINA) sub-station farm, Rangpur during Rabi season of 2021-22 to determine the effect of varieties and foliar application of boron on the growth and yield of green chili. The treatments were laid out in a Split-plot and replicated three times. Different concentrations of foliar Boron were applied as foliar sprays. The experiment comprised of nine treatments: T₁= 0.5 g BL^-1H₂O at vegetative stage, T₂= 1.0 g BL^-1H₂O at vegetative stage, T₃=  0.5 g BL^-1H₂O at vegetative stage + 1.0 g BL^-1H₂O at Fruiting stage, T₄= 1.0 g BL^-1H₂O at vegetative stage + 1.0 g BL^-1H₂O at Fruiting stage,  T₅=  1.5 g BL^-1H₂O  at vegetative stage & T₆= 1.5 g BL^-1H₂O at vegetative stage + 1.5 g BL^-1H₂O at Fruiting stage, T₇= 2.0 g BL^-1H₂O at vegetative stage, T₈= 2.0 g BL^-1H₂O at vegetative stage + 2.0 g BL^-1H₂O at Fruiting stage & T₉ = Control and two chili varieties/lines viz. Binamorich-2 & RCL-1. From the present study, it was concluded that the highest fresh chili yield (18.11 tha^-1) produced Binamorich-2 compared to RCL-1 which gave 14.52 tha^-1. Among the nine treatments of foliar boron, B @ 2.0 g/L H₂O at vegetative stage + B @ 2.0 g/L H₂O at fruiting stage exhibited the highest fresh chili yield (21.22 tha^-1). In respect of the interaction effect of foliar boron and variety, the Binamorich-2 was giving the highest fresh chili yield (25.00 tha^-1). However, further research will be needed with different doses of foliar boron for promising production of chili at different locations of Bangladesh.

Keywords: Effect, Varieties, Foliar boron, Growth, Yield, Green Chili.