(a)Name the tropical sugar cane variety grown in South India.How has it helped in improving the sugar cane grown in North India?(b)Identify 'a','b','c' in the following table:
(a) Saccharum officinarum, crossed with, North Indian variety (Saccharum barberi) to increase quality.(b) 1. Aphids2.Jassids/aphids/fruit borer.3.Okra(Bhindi).