B. S. VYAKARANAHALSHIVASHANKARAGOUDA, PATIL2019-04-042019-04-042004-01-23Th-7045http://krishikosh.egranth.ac.in/handle/1/5810100370STUDIES ON NIPPING OF AUXILLARY FLOWER BUDS AND MICRONUTRIENT APPLICATION ON SEED YIELD AND QUALITY OF SUNFLOWER RESTORER LINE, RHA-857 SHIVASHANKARAGOUDA PATIL 2001 ' Dr. B. S. VYAKARANAHAL Major Advisor ABSTRACT Most of the restorer parents used in sunflower hybrid seed production are of multi branched with low productivity. To solve these constraints, an investigation on nipping of auxiliary flower buds and micronutrient application on seed yield and quality of sunflower restorer line, RHA-857 was carried out by conducting a field experiment at Main Research Station, University of Agricultural Sciences, Dharwad. The experiment was laid out in Randomized Block Design with factorial concept and consisted of two factors viz., nipping (2) and micronutrients application (5) and with one control (no nipping/no micronutrient). In restorer line, continuous nipping of auxiliary flower buds from 35 days after sowing (DAS) onwards recorded significantly higher yield and its attributes. Seed yield per hectare increased 65.8 per cent over control. The yield attributes like yield per plant, capitulum diameter, filled seed number, seed filling per cent, seed recovery per cent and 100 seed weight were also increased in this treatment. This was followed by nipping of side branches once at 55 DAS over control. Plant height and chlorophyll content in leaf were significantly higher in nipped plants, while higher dry matter was found in control plants. Seed quality parameters like germination percentage, rate of germination, root length, shoot length, vigour index, dry weight and oil content were significantly higher in the seeds of nipped plants over control.ennullThesis