If you've grown citrus trees at home, you’re likely to have come across swollen galls on your grapefruit, lemon, lime or orange. They are caused by citrus gall wasps (Bruchophagus fellis). 🍊🍋🐝 While the galls generally won’t kill trees, they can seriously impact their vigour, reducing the size and yield of fruit, and causing growth to be weak and spindly. Jane shows us how to say goodbye to gall wasps! | Gardening Australia