Preserving the food is a skill to learn as we have understood that no food is available all-round the year and mango is the favorite fruit of most of the people so does for the bacteria and germs and preserving food means that it will be only for us not for the germs and bacteria that could ruin the fruit and make it harmful for us.
So chinnababu made mamidi tandra so that they can enjoy the fruit all time of the year. that the title of the story tells.