Sweet potato weevil management
1)Field sanitation to destroy alternate  hosts

2)Select uninfested plantingmaterial. 

3) Cultural methods like earthing up,  providing irrigation, crop rotation etc.

4)Spraying the crop at monthly intervals  with 0.05 % of fenitrothion or fenthion ormonocrotophos is effective. orSoil drenching withfenthion,  endosulfan, quinalphos, monocrotophos  and fenitrothion 0.05 % at 50 & 70 DAP.