Apple_chat_fruit
Apple chat fruit MLO
Disease of apple trees
Apple chat fruit MLO, also known as "apple small fruit" and "chat fruit of apple",[1] is a mycoplasma-like organism (MLO)[2] that affects only apple trees, specifically Lord Lambourne and Tydeman's Early Worcester,[3] though in North America, Turley, Winesap, Jonathan, and Golden Delicious can be affected.[4] Symptoms include delayed fruit development, smaller green apples during harvest, delayed fruit drop, and circular spots on the apples themselves.[3][5] The disease is widespread throughout Europe, especially England and Wales, but is also present in parts of North America, South Africa, and New Zealand.[3] There are no known insect vectors and no transmission method other than grafting is known.[4] The disease itself is not fully systemic[3] and virulency is varied among individuals.[4]