The varieties of castor change depend on the branching habits of the plant, stem colour, the nature of capsules like smooth or shiny and size of the seed.
High yielding castor varieties are NPH-1 (Aruna), GAUCH-4 and TMVCH.
Newly released Castor hybrid varieties are cultivation in Tamil Nadu is TMVCH by Oilseeds Research Station of the Tamil Nadu Agricultural University (TNAU) Tindivanam. This hybrid matures in 160 to 170 days. Its seeds have 51.7% oil. It is susceptible to semi looper pest and resistant to wilt and grey mold.
