(a) Discuss briefly the rosette disease of groundnut under the following headings: (i) causal organism: (ii) symptoms  (iii) method of transmission; (iv) damage done (v) preventive and control measures.

(b) Assuming the spacing of a g vegetable crop per stand is 30 cm x 30 cm, calculate the plant population expected in a portion of land measuring 60 m x 30 m