What are Citrus Galls? Citrus galls are unsightly swellings caused by a tiny female citrus gall wasp (Bruchophagus fellis) which lays her eggs in the soft new growth of citrus trees in spring. As the new growth hardens off, a woody gall forms around the growing wasp larvae. Each gall contains many wasp larvae, eachContinue reading “Citrus Problems – How to Control Citrus Gall Wasp, Methods That Work”