Post Flowering Management Using Plant Growth Regulators in Greengram (Vigna radiata L.)

Aim: The study was conducted to evaluate the effect of Auxin and Zeatin-based nanoformulations in post-flowering management in greengram.

Place and Duration of Study: Nanoformulations were standardized at the Department of Nano Science and Technology, Tamil Nadu Agricultural University, Coimbatore and a field trial was carried out at Agricultural Research Station, Bhavanisagar.

Methodology: Nanoformulations were standardized by oil in water nanoemulsion technique and effect on crop is observed by foliar spray of nanoformulations during the flowering stage of crop growth.

Results: Increased chlorophyll content due to NAA and Zeatin and extended retention of chlorophyll in Auxin-based treatments has been recorded. Hence the crop can produce more assimilates leading to increased seed yield. Zeatin spray also recorded increased chlorophyll, mature pods, number of seeds pod-1, seed weight, pod setting percentage. Such an increase of yield attributes was mainly due to decreased flower shedding percentage.

Conclusion: Growth regulators such as Auxin and Zeatin exhibited a significant role in increasing plant chlorophyll content and yield of greengram. Among treatments, Nanoemulsion of NAA @ 30ppm recorded a higher number of mature pods, seed yield, seed weight and lower flower shedding percentage which is concluded as the best treatment.