a) Name the tropical sugar cane variety grown in South India. How has it helped in improving the sugar cane qality grown in North India?
b) Identify 'a', 'b' and 'c' in the following table:

Explanation

i) The tropical sugarcane variety grown in Sourthern India is Saccharum officinarum which has a thicker stem and high sugar content, however, it could grow in Northern India Saccharum barberi is natively grown in Northen India.
These two varieties were crossed to get the desirable qualities of both (higher sugar content, thicker stem and the ability to grow in Northern India).
ii) a) Aphids
b) Jassids and fruit borer
c) Okra (Bhindi)