Vulnerable trees -- Dr Baksh writes on scab, mildew, diseases of the bark and apple storage diseases

摘要

AN ANCIENT FRUIT, the apple (Maius sy/vestris) is grown throughout the temperate world, with the bulk produced in the 'New World' and Southern Hemisphere But the apple is an 'Old World' fruit with roots firmly embedded in the fertile soils and ancient civilizations of Western Asia Indeed the cultivated apple is thought to originate from wild apples (Ma/us pumila), which are small, rosy-red, intensely sour apples found growing wild throughout Europe and Western Asia. In England, it is commonly called the crab apple and is used to make a clear jam called crab apple jelly.