Why onion prices rise during Maharashtra election? questions BJP's GVL

BJP Leader Guntupalli Venkata Lakshmi (GVL) Narasimha Rao said that the central govy is serios about onion prices. Modi govt has undertaken several initiatives to control onion prices so that consumers can be benefitted. Export has been banned and the govt is improving its availability. 
He questioned that Why every time onion prices rise during Maharashtra's elections?