This sounds like damage caused by silverleaf whitefly which is a pest of many different plants - particularly in tropical regions. Some images would be useful to confirm if you can upload some. Remove any really badly infested leaves and discard (tie them up in a plastic bag and put into the trash). You can also try spraying the leaves with a strong jet of water from a hose to dislodge the adults. Unfortunately, chemical control in the home garden is not always effective and pesticides can harm populations of natural enemies. If you do try to spray the plants, use an insecticidal soap containing neem and try to coat the plant as much as you can, particularly the leaf undersides where the insects are hiding.