Effect of foliar spray of GA3 and NAA on sex expression and yield of bitter gourd

Abstract

A field experiment was conducted at the Plant Physiology field of Horticulture Research Center, BARI, Gazipur during two consecutive years of kharif 2014 and 2015 to assess the effect of GA3 and NAA on sex expression, yield and yield components of bitter gourd (Momordica charantia L.) var. BARI Karola-1. Eeleven treatments comprising five concentrations each of gibberellic acid (50, 100, 150, 200 and 300 ppm) and naphthalene acidic acid (50, 100, 150, 200 and 300 ppm) along with distilled water considered as control were evaluated in randomized complete block design with three replications. Gibberellic acid (GA3) and Naphthalene acidic acid (NAA) were sprayed at 4 leaf stage; second spray was done at 35-38 DAS and third spray done at flowering stage. All the treatments improved the flowering and yield characters over control. Foliar spray of NAA @ 150 ppm and 200 ppm was found better in terms of sex expression, yield and yield attributes of bitter gourd as compared to control and other treatments. Spray of NAA @ 150 ppm gave the lowest number of male flowers and the highest number of female flowers thereby produced the lowest sex ratio (male:female). Number of fruits/plant, individual fruit weight and fruit yield/plant were also found maximum from NAA 150 ppm. Maximum fruit yield was recorded with the application of NAA @ 150 ppm. Spraying of NAA @ 150 ppm gave the maximum gross return and net return with the highest BCR of 3.17.
 Bangladesh J. Agril. Res. 44(2): 281-290, June 2019

Effect of Plant Growth Regulators on Growth, Fruit Yield and Quality of Kharif Season Bitter Gourd (Momordica charantia L.)

“…The maximum Vitamin C of Bitter gourd due to treatment might be due to fact that NAA regulate the growth by causing cell division and cell elongation in plant system. These results are in conformity with Khatoon et al [15]. While the minimum value in treatment T0 (control) may owes to its inhibitory effect because this treatment occupy only recommended dose of fertilizers in bitter gourd.…”

Influence of Different Plant Growth Regulators and Boron on Growth, Yield and Sex Expression of Bottle Gourd (Lagenaria siceraria Mol.) under Garhwal Valley

“…The combined application of NAA and boron can increase fruit weight due to increased nutrient availability, high nutrient uptake, and photosynthetic rate, all of which boost the fruit output of bottle gourd. Khatoon et al [15]; Fozia et al [16] discovered comparable results in bitter gourd. The longest fruit was found in NAA @ 200 mg/kg+ Boron @ 0.1%, which was shown to be significantly superior to the other treatments.…”

Seed priming and GA3 field application enhanced growth, yield and postharvest quality of okra

“…Tomar and Ramgiry [55] found the best effect of GA3 application on yield per plant was at the concentration of 125 ppm in tomato while another author [56] found a gradual increase in the yield per plant with higher concentration (200 ppm) of GA3. Studies reported that GA3 100 ppm followed by GA3 150 ppm in bitter gourd produced the maximum fruit weight [57] , application of 100 ppm GA3 led to the maximum yield in cucumber [58] . Our present result also supports the authors' depiction of higher yield with a higher concentration of GA3.…”