Several cane varieties which were once the mainstay of the sugar and -gur'industry of this Province have other gone out of existance altogether or are now retained only in small-scale varietal collection plots on reearch Stations.Some of these varieties occupied large areas for only for a short period.This was due to several causes.natural,and artificial It is propposed to present in this paper a historical review of the rise and fall of the important cane varieties till now cultivated on a large scale in this Presidency and to discuss the causes responsible for their replacement.Incidentally, the question,whether sugarcane varieties deteriorate in the physiological or genetic sense of the word is also deals with here.The yield and other data from the Sugarcane Research Station,Anakapalle,are furnished for purpose of illustration.
M. Lakshmikantham (Sat,) studied this question.