Coleus forskohlii is an important medicinal plant which has a great role in Indian Ayurvedic medicine. It is the only source of the alkaloid forskolin the plant kingdom. It has excellent potential in the drug trade. It is used as a stomach aid and in treating intestinal disorders. This article reviews the effect of different sources of explants, different agents of sterilization, various media composition on micropropagation of the crop of high medicinal value. The best source of explants for initiation of cultures was the nodal segments of Coleus, since they withstood the sterilization process better than apical shoots, exhibiting maximum survival frequency. Simultaneously, when nodal segments were used as explants, shoots multiplied at a rate of 12 fold every six weeks. Sterilization with HgCl₂ shows a good response; however, prolonged sterilization time tends to show browning. In most of the study, Proline was effective for avoiding the browning during in vitro regeneration of Coleus forskohlii. The maximum percentage of shoot induction from the nodal segment was achieved on the medium containing BA (2 mg/l) and NAA (1 mg/l). Among two cytokinins (BAP and kinetin), BAP (2.0 mg/ l) was superior for the regeneration of shoots in Coleus. IAA (1.0 mg/l) was a prominent hormone for rooting of regenerated shoots.

With a view to study the influence of irrigation regimes at critical stages of sugarcane an investigation was carried out at Agricultural Research Station, Tamil Nadu Agricultural University, Bhavanisagar, India during Mid‐late season (March–April) using Co 6304 as test variety. Treatments consisted of eight irrigation regimes created by imposing two levels of irrigation 0.75 and 0.5 IW/CPE ratio at critical stages (tillering, grand growth and maturity). The results revealed that irrigating sugarcane at 0.75 IW/CPE ratio at tillering and growth and 0.5 IW/CPE at maturity phase recorded highest nutrient uptake, cane yield (139 t/ha) with 10.6 % CCS consuming 1791 mm of water the highest water use efficiency of 77.3 kg/ha mm.

The conservation and utilization of indigenous coconut accessions or germplasms has been undertaken worldwide due to is economic magnitude. The aim of present study was designed to evaluate the five Tamil Nadu (a southern India state) elite indigenous coconut accessions for high nut yield and nut quality. Experiments were conducted in