The peels of grapefruits are frequently infested with insects and must be checked.
If one is not using the peel―it Need not be checked. However, it should be rinsed before peeling or cutting open the grapefruit, or squeezing it―so the infestation does not travel to the inside.
If using the peel, rub it with steel wool or with a brush. Then, check to make sure there are no signs of infestation
Even though the peel of a grapefruit is frequently infested, when one purchases a product that uses the peel, such as a candied product or a jam, and it is produced by a major firm―one need not be concerned about the infestation, since the peels are cleansed in processing
Not infested under normal circumstances. Need not be checked.
Even though the peel of a grapefruit can be infested, one need not be concerned when purchasing grapefruit juice that is commercially produced. In processing, the grapefruits are cleansed of any such infestation