Uncut ripe fruit can be refrigerated until eaten,
but limit this to two or three days.
Cut avocado can be sprinkled with lemon juice, lime juice or white
vinegar and placed in an air-tight container in the refrigerator. They should
be eaten within a day or two. If the top layer goes brown, you can simply
scrape this off and you'll find the flesh underneath is perfectly fine.
Avocado can be pureed with lemon juice and frozen for up to four months.