The stings from the fly cause raised corky spots which detract from the appearance of the fruit. Maggots do not usually develop.
Scale insects Red scale and soft brown scale can be a minor problem.
Citrus mealy bug Citrus mealy bug can be a pest, especially in very dense vines. Diseases Septoria spot Septoria spot is a common problem on both fruit and leaves. Spots on leaves are 2 to 4 mm in diameter and cause young leaves to fall. On the fruit, the spots reduce the value of the produce. Spray every three to four weeks.