The disease, according to the nurseries, is leaf miner. You may be referring to citrus leaf miner, a pest that tunnels through the foliage. The adult insect is a moth with white, silver rainbow colored forewings and brown stripes and black markings on each wing tip. The moth lays eggs, which hatch, and the larvae leave silvery trails as they damage the foliage. The larva moves to the edge of a leaf before it pupates, and the leaf curls around the pupa.
Young foliage is particularly susceptible.
Remove damaged leaves. Do not fertilize, as new growth is more vulnerable to attacks. This troublesome pest is difficult to control. You may find some help from a product containing neem, malathion or dormant oil. Chemicals may eliminate natural predator wasps, however.