IMPACT OF FOLIAR SPRAY OF BIOREGULATORS IN TERMINAL HEAT STRESS CONDITION ON TEST WEIGHT, OIL CONTENT AND SEED VIABILITY OF MUSTARD (BRASSICA JUNCEA L.)ABHISHEK PATI TIWARI AND C.B. SINGH GANGWARAbstract The experiment was conducted during the years 2019-20 & 2020-21 at Oil Seed Farm of C. S. Azad University of Agriculture & Technology Kanpur. Two varieties namely Kanti (V1) and Maya (V2) seeds were sown in Rabi 2019 and 2020 and seven chemicals concentrations of bioregulators were applied as foliar spray treatments at vegetative stage, at anthesis stage and at both stage viz., Salicylic acid (SA) 800 ppm (T1, T8 and T15), Salicylic acid spray at vegetative stage @ 400 ppm (T2, T9 and T16), Ascorbic acid (AA) 10 ppm (T3, T10 and T17), Potassium chloride (KCl) 1% (T4, T11 and T18), thiourea (TU) 400 ppm (T5, T12 and T19), Cycocel (CCC) 800 ppm (T6, T13 and T20), Cycocel 400 ppm (T7, T14 and T21) and T0-Control (without spray). Freshly harvested seeds were investigated for test weight (1000 seed weight), oil content % and seed viability % and significantly maximum test weight (4.57g) and seed viability (98.46%) recorded from the treatment T19 followed by treatment T16 as compared to control, while on oil content % no significant effect of treatment was recorded. Variety Maya showed significantly superior performance on test weight and oil content over variety Kanti but seed viability did not differ signicantly. |