Journal of Advances in Biology & Biotechnology

In the world's India is largest producer of okra. The date of planting and cultivar selection are critical cultural elements for achieving less incidence of Yellow Vein Mosaic Virus (YVMV), optimum yield, high returns, and quality. It is a significant factor that influences the physiological, morphological, and yield aspects of any crop plant. The presents study was conducted at the Department of Vegetable Science's Vegetable Research Farm in CCS Haryana Agricultural University, Hisar, during the rainy season 2020–21 with five different dates of sowing i.e. S1 (15^th June), S2 (30^th June), S3 (15^th July), S4 (30^th July) and S5 (14^th August) and three varieties V1 (Varsha Uphar), V2 (Hisar Naveen) and V3 (Hisar Unnat). According to the study, minimum infestation of Yellow Vein Mosaic Virus (9.8%) and severity of disease (8.2%) were recorded when sowing was done on 15^th June which was statistically at par with 30^th June and 15^th July dates of sowing, whereas, maximum was recorded when sown on 14^th August. Among various cultivars, Hisar Naveen exhibited minimum infestation to YVMV (9.2%) and severity of disease (8.6%). However, in quality parameters the highest levels of dry matter, ash content, and acidity were observed on the 15^th of July in the Hisar Naveen cultivar, while the lowest levels were noted on the 14^th of August in the Hisar Unnat cultivar. The maximum amount of ascorbic acid content was recorded on the 14^th of August, with the minimum observed on the 15^th of June. Additionally, among the cultivars, Hisar Naveen exhibited the highest ascorbic acid content, while Hisar Unnat displayed the lowest under the prevailing climatic conditions in Haryana.