Post Flowering Management Using Plant Growth Regulators in Greengram (Vigna radiata L.)
B. Kesava Priya
Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore - 641003, India.
S. Panneerselvam *
Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore - 641003, India.
S. Marimuthu
Department of Crop Management, Agricultural College and Research Institute, Eachangkottai – 641902, India.
K. S. Subramanian
Department of Nano Science and Technology, Tamil Nadu Agricultural University, Coimbatore - 641003, India.
A. Senthil
Department of Crop Physiology, Tamil Nadu Agricultural University, Coimbatore - 641003, India.
*Author to whom correspondence should be addressed.
Abstract
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.
Keywords: Greengram, naphthalene acetic acid, zeatin, post flowering management, chlorophyll, yield attributes