Effect of Naphthalene Acetic Acid (NAA) on Blossom Drop in Chili (Capsicum frutescens)

Chili (Capsicum frutescens) is a significant cash crop in Bangladesh. It is very popular spices and the demand of chili is increasing day by day. To investigate the influence of Naphthalene Acetic Acid (NAA) on bloom drops in Chili cv. BARI Morich-3 from November 2020 to April 2021. These types demonstrated the optimal dosages of NAA as a foliar spray in reducing blossom drop with the application of five different concentrations of NAA at 0, 10, 20, 30, and 40 ppm, respectively. It was determined that 10ppm NAA performed the best, and it takes the fewest days (43.33) to first flowering, the fewest days (50) to 50% blooming, the fewest days (48.44) to first fruiting, and the fewest days (60.11) to 50% fruiting. It also reduces the number of bud drops (12.39), flowers drops (13.89), fruits drops (12.11), and increases the number of fruits plant-1 (41.61) and fruit plant-1 weight (70.94) when followed by 20 ppm, 30 ppm, 40 ppm, and 0 ppm NAA. For the parameter plant height 10ppm NAA was found to be optimum. The highest average plant height (72.61cm) was observed from 20ppm NAA. This result defines that NAA @10ppm is very beneficial for reducing blossom drop and increasing the growth and yield of chili.