Evaluation of varieties and standardization of planting time on quality and storage attributes in multiplier onion (Allium cepa var. aggregatum Don.) under southern Telangana region

A study titled evaluation of varieties and standardization of planting time on quality and storage attributes in multiplier onion (Allium cepa var. aggregatum Don.) under Southern Telangana region was conducted during rabi season of 2023-24 at Vegetable Research Station, Rajendranagar, Hyderabad. The research aimed to assess the effect of varieties, planting time and their interaction on quality and storage attributes of multiplier onion. The experiment followed is Factorial Randomized Block Design (FRBD) with two factors: varieties (CO-6, CO (on) 5, Aca-15) and planting time (16th November, 1st December, 15th December, 1st January). Quality parameters including Total Soluble Solids and ascorbic acid were recorded during the study. The study revealed that the variety Aca-15 recorded maximum TSS (19.04 0Brix) and ascorbic acid (8.53 mg/100g) and 1st December planting recorded maximum TSS (20.25 0Brix) and ascorbic acid (8.93 mg/100 g). The study also evaluated storage parameters, including Physiological Loss in Weight and storage rot at 15 and 30 days after harvest (DAH). Notably, minimum PLW at 15 and 30 DAH was recorded in the variety CO (On) 5 (4.56 and 8.56%) and storage rot was also minimum in CO (On) 5 (3.02 and 7.38%) and 16th November planting resulted in minimum PLW (3.88 and 7.88%) at 15 and 30 DAH and minimum storage rot (3.00 and 6.77%). The interaction between varieties and planting time significantly influenced TSS, ascorbic acid, Physiological Loss in Weight and storage rot. Local evaluation of onion varieties identifies top performers and optimal planting times, helping farmers improve quality, reduce waste, and boost sustainability of multiplier onion production in the Southern Telangana region.