Godara, R.K.Komal2017-11-162017-11-162017http://krishikosh.egranth.ac.in/handle/1/5810035806The experiment entitled “Effect of sequential application of herbicides on weed control and yield of Kinnow” was conducted at Research Farm of the Department of Horticulture, CCS Haryana Agricultural University, Hisar during the year 2016 to find out the suitable herbicides and repeated application of herbicide mixture on weed control and nutrient content in plants as well as improvement in yield and quality of kinnow. The treatments comprising 13 levels of herbicides and their combination and nine levels of repeated application of herbicide mixtures were laid out in a randomized block design with three replications keeping a net plot size of 6.0 x 6.0 m separately. The data were recorded on various parameters,, which were influenced significantly by different levels of treatments. In repeated application of herbicide mixture, soil physico -chemical properties and nutrient status was not much changed during the time frame while, glyphosate +pendimethalin (1% + 1kg/ha) spray in April, June, August and October found best for all other parameters viz.,. yield, quality and weed parameters but it was costly and glyphosate +pendimethalin (1% + 1kg/ha) spray in April, June and August proves to be equally effective in yield and quality characters. Thus sprayof glyphosate +pendimethalin (1% + 1kg/ha) in April, June and August is best and economical for higher yield with quality fruit production at commercial scale. In efficacy of different herbicides, soil physico -chemical properties and nutrient status was not much changed during the time frame. However, mechanical weeding after 30, 60 and 90 DAT treatment found best for all other parameters viz.,. yield, quality and weed parameters while, in herbicidal treatments, pendimethalin + glyphosate (1 kg/ha + 1%) recorded best for the same. Mechanical weeding after 30, 60 and 90 DAT treatments gave the best results but it was very costly and herbicidal combination of pendimethalin + glyphosate (1 kg/ha + 1%) resulted almost similar to mechanical weeding treatment. Pendimethalin + glyphosate (1 kg/ha + 1%) found best and economical combination for commercial production of Kinnow with quality fruits under semi arid condition of Hisar (Haryana).ennullThesis