Effect of pre and postharvest plant growth regulator treatments on yield and quality of Kulai Chilli ( Capsicum annuum var Kulai)

• मुख्य लेखक: Lydianie Wesley
• स्वरूप: थीसिस
• भाषा: अंग्रेज़ी; अंग्रेज़ी
• प्रकाशित: 2017
• विषय: SB320-353.5 Vegetables
• ऑनलाइन पहुंच: https://eprints.ums.edu.my/id/eprint/38511/1/FULLTEXT.pdf; https://eprints.ums.edu.my/id/eprint/38511/2/ABSTRACT.pdf

Chilli is one of the most important commercial vegetable in Malaysia which consumption per capita ranged from 1.3 kilograms to 2.2 kilograms per year. One of the problems in chilli production namely Kulai variety is low harvesting volume per harvesting visit. Thus, the objectives of this study are (1) to investigate reproductive characteristics of chilli as indicator for harvesting schedule, (2) to determine the effect of selected pre-harvest treatments (Naphtalene acetic acid (NAA), Gibberellic acid (GA3), and Indole acetic acid (IAA)) at different levels on plant growth, fruit yield, and quality attributes of chilli and (3) to determine the effect of Naphtalene acetic acid (at 40ppm) as post-harvest treatment on quality attributes of chilli during storage. For objective number one and two, Kulai chilli plants were planted using seven treatments (Ti-Control, TrNAA 20 ppm, T3-NAA 40 ppm, T4-GA3 10 ppm, Ts- GA3 20 ppm, T5-IAA 25 ppm, T,- IAA 50 ppm) with 5 replications. Chilli height with GA3 20ppm application is significantly higher than the other treatments from 30 to 90 days after transplanting. Chilli treated with IAA S0ppm and NAA 40ppm showed significant earliness in days to chilli fruit maturity (index 1-index 5). Fresh weight of chilli treated with NAA 40ppm and GA3 l0ppm are significantly higher than other treatments. For number of seeds per fruit, chilli treated with NAA 20 ppm, NAA 40ppm and GA3 10 ppm showed no significant different. Fruit length, capsaicin content, vitamin C content and yield per plant with NAA 40ppm application is significantly higher compared to other treatments. However, treatments with IAA S0ppm showed significant earliness in days of first flowering. Based on data collected from pre-harvest studies, the best plant growth regulator treatment (NAA 40ppm) was selected for post-harvest studies. Postharvest treatments- include three packaging methods (non-perforated polythene, perforated polythene, and open trays as control), three storage temperatures (room temperature, refrigerated condition at s0c and 10°C) and three storage duration (3, 6, 12 days) with four replications were performed. Percentage of weight loss, firmness, color, fruit rotting, capsaicin content and vitamin c content of the chilli fruit were recorded. Chilli packed in non-perforated polythene at 5°C resulted in lowest percentage of weight loss and decay, firmness and green color of the fruits were retained and significantly higher capsaicin and vitamin C content compared to other treatment combination. Thus, this study recommend harvested Kulai chilli to be packed using non-perforated polythene and store at 5°C to maintain the postharvest qualities.