Studies on synchronization of flowering in parental lines of RCRMH-4 maize hybrid

A field experiment was carried out to study the effect of foliar application of growth regulators, nutrients and fertilizers on synchronization and seed yield of maize hybrid (RCRMH-4) at Agricultural Research Station, Bheemarayanagudi during Rabi 2022-23. The experiment was laid out in a Randomized block design with fifteen treatments including control which were replicated thrice. The results revealed that, among the various treatments applied in the study, the male line treated with foliar spray of amino acid @ 2 mL L^-1 + GA₃ @ 250 ppm + potash @ 5 per cent + urea @ 2 per cent recorded higher plant height of male parent (180.22 cm) and the synchronization of 50 per cent flowering between two parents has been reduced by 4-5 days to 1.19 days. Also, significantly higher cob length (13.68 cm), cob diameter (3.42 cm), cob weight per plant (75.62 g), hundred seed weight (30.77 g) and Seed yield (31.55 q/ha) has been recorded. The sowing of male and female parent on the same day (Control) was registered lowest values for the entire seed yield and its components.