Should the government regulate the price of bananas?
(source: dineshbakshi.com)  

As you can see in the graph, price controls policies create excess demand, therefore you will end up with shortage or you will import more bananas.

I'm not a banana expert, but I assume bananas are pretty inelastic. Also, banana supply is inelastic in the short run (they have already planted bananas), therefore the excess demand will be less than the graph shows.

Whatever the case, price control policies generate deadweight loss and it depends on the elasticities who loses more (consumer vs supplier). This market is no longer efficient and that impacts the welfare negatively.