grapefruit

I live in Arizona and have beautiful citrus trees that I love. In the late summer, it gets really hot here, my grapefruit tree lost 90% of its leaves. Then new growth leaves were small and kind of light green in color. I don't know what to do! Any suggestions would be greatly Appreciated! The...

Does anyone know how to deal with gall wasp in a dwarf grapefruit? They don't bother the other citrus but the little gf is riddled. Maybe it's weakened by the dwarfing root stock? Jeff