The alternate host plant for mango hopper insect is:

Correct option is D

The correct answer is (d).
While the primary host for the mango hopper insect is mango, some studies indicate that fig ( Ficus carica ) and sapota can also serve as alternate hosts. 
· Primary Host:
Mango is the primary host plant for mango hoppers. 
· Alternate Hosts:
2. Fig (Ficus carica): Purthi and Batra (1960) reported that mango hoppers were found sucking sap from fig. 
2. Sapota: Nayur et al. (1976) also reported mango hoppers on sapota. 
Management:
· Removing alternative hosts like moringa and silk cotton from the vicinity of mango orchards can help reduce the population of mango hoppers.